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[TICKING]
[THEME MUSIC]
CARL AZUZ: On the Vernal
Equinox, what's officially

the first day of spring in
the Northern Hemisphere,

we're thankful you've set aside
10 minutes to watch "CNN 10."

I'm Carl Azuz at the CNN Center.
In the US Midwest, the north
central part of the country,

there are states of emergency in
Nebraska, Iowa, and Wisconsin.

Lots of rain plus melting snow
plus a late winter snowstorm

brought by a bomb cyclone have
left many places under water.

Part of the problem was
that the ground was still

frozen when the rain
came, and it wasn't

able to absorb the water.
So it found its way
to rivers and streams

and caused them to burst
their banks and spread water

all over.
On Tuesday morning,
the National Weather

Service said more
than 8 million people

were under flood warnings.
Nebraska was hit
particularly hard.

Its governor said
the flooding was

the most widespread disaster
Nebraska had ever faced.

US Vice President Mike
Pence traveled there

yesterday to survey the damage.
Nebraska's governor is
hoping the federal government

will allow public funding to
be used to help those affected.

In 17 places across the state,
flood records were broken.

And in Iowa, 41 of the
state's 99 counties

have been declared
disaster areas.

In addition to at
least four lives that

were lost in Nebraska
and Iowa, farmers

have lost grain and livestock.
Fields are under water.
Private water supplies
are threatened.

South of Nebraska and Iowa,
the Missouri and Mississippi

rivers, which are already at
minor or moderate flood stage,

are expected to rise higher
in the next few days.

So states like Kansas,
Missouri, and Illinois

could see more flooding
in the days ahead.

In some places farther north,
the water has begun to recede.

In others, the threat remains.
STEPHANIE ELAM: This
is Winslow, Nebraska.

And for several days,
the people who live here

in this small town of
less than 200 people

couldn't even get in here
to see what it looks like.

Now, they're able
to clear away some

of the debris on the roadway.
But as you can see, look
at the speed limit sign.

You can see how high the
water still is, how high up

it is on these houses.
And every one of the
houses in this town

are surrounded by water.
You could see, so many
things have been pushed away,

toys, picnic benches,
and even stairs

moved far away from
the homes that they

used to stand next to.
Right now, while they're able
to get closer, they still

cannot get into their homes.
And they don't know when they'll
be able to because there's

still so much water in here.
And this is just
one system where

the water is starting
to recede, where

in others, it's still cresting.
So this is just a
microcosm, a small picture

of what is happening
throughout Nebraska

with these massive,
devastating floods.

And I talked to one
couple that has lived here

for several decades,
over 30 years,

and asked them if they
were going to rebuild.

And he said, we have
nowhere else to go.

This is where we belong.
[MUSIC PLAYING]
[EXPLOSION]
- Whoa!
[SCREAMING]
[ALARM SOUNDING]
MICHAEL GARNETT: My entire
apartment started shaking.

And there was a huge boom.
I was just terrified.
I had no idea what
was happening.

CARL AZUZ: So if
a meteor explodes

in the atmosphere and no
one's around to hear it,

does it make a sound?
NASA says it did.
The fireball that blew up 16
miles over the Earth's surface

in December was the
second most powerful one

to enter our
atmosphere in 30 years,

according to the space agency.
So why wasn't this
reported in December?

Because scientists
just noticed it.

It was originally detected
by military satellites

and reported to NASA afterward.
Why didn't pictures and video
go viral on social media

like those of
other fireballs do?

Because it happened
over the Bering Sea

in a pretty remote
part of the world.

And relatively few
people noticed.

What exactly caused a
blast that powerful?

A meteor that scientists say was
probably a few meters across.

That's all it takes to release
173 kilotons of energy.

And for reference, one
kiloton is equivalent to 1,000

pounds of TNT.
Should you be worried
about another one?

Scientists say no.
Most fireball
events are smaller.

There have already been five
noteworthy explosions in 2019.

10 second trivia.
Where would you be
most likely to find

mycelium, a mass of filaments?
In granite, on a CT scanner,
on body armor, or in fungi?

The vegetative part of a
fungus is called mycelium.

A growing number of
artists, furniture

makers, and even clothiers are
using mushrooms to make stuff.

And a big provider of
the material for this

is a New-York-based
company called Ecovative.

It's a bio-materials
organization that's

received millions of
dollars in grant money

from the US government, in
addition to private funds

from private investors.
It's worked on
everything from building

materials to
packaging, all based

on using part of the mushroom.
When it comes to
shipping materials,

it's not always the perfect
substitute for Styrofoam

or other plastics.
Ecovative's original
mycelium foam

could be more expensive to
use than traditional materials

for lightweight packages.
But its makers say it is
better for the environment.

And it's changing the way
people think about mushrooms.

[MUSIC PLAYING]
- Since the 1950s,
humans have produced

over 9 billion tons of plastic.
Most of that is
ending up in landfills

and could take
centuries to decompose.

A miracle material
found in nature

could be the key to
reducing plastic waste.

It's called mycelium, and
it comes from mushrooms.

EBEN BAYER: Mycelium is like the
root structure of a mushroom.

You're used to seeing a
mushroom above ground.

Mycelium is like the
roots beneath it.

But no one had ever tried to
use them to make materials.

- Eben Bayer is the CEO of
Ecovative, a company that

has developed a way
to grow mycelium

into specific shapes and sizes.
They start by taking
organic plant waste

and mixing it with
mycelium cells, which

act as a sort of natural glue.
EBEN BAYER: The
mycelium grows through

and around those particles.
And it binds them together.
And you've got a grown product.
- Ecovative's mycelium products
provide a natural alternative

to packaging materials made
out of plastic and Styrofoam.

EBEN BAYER: But at the
end of its useful life,

you can actually break
it up, and you could

put it in your own garden.
So it's a nutrient,
not a pollutant.

- Ecovative wants to take
mycelium to the next level.

EBEN BAYER: Our
current technical focus

is developing the next
generation of mycelium

materials, from
cell scaffolding,

to leather-like materials,
and even meat replacements.

- AKA, mycelium bacon, which
is still in its testing phases.

The company thinks
mycelium could also

play a major role in
construction and even

in regenerative medicine.
EBEN BAYER: It really has
boundless possibilities.

And it comes from its ability
to move from the micro scale

to the macro scale.
CARL AZUZ: An astrolabe
found off the coast of Oman

in the Middle East
has just been awarded

the title of world's oldest
by Guinness World Records.

An astrolabe is
an instrument that

was used for centuries
to mark the positions

of the sun and stars.
They were first used
by astronomers hundreds

of years BC.
And sailors used them
in the Middle Ages

until astrolabes were
replaced by sextants.

Today, just over 100
mariners astrolabes are

known to exist in the world.
But add this one to the tally.
About five years
ago, divers found it

at a shipwreck site near Oman.
Researchers believe it was
made between 1496 and 1501.

And it's thought to have been
used by Portuguese navigator,

Vasco da Gama, who
was the first European

to sail from Europe to India.
The astrolabe had to be kept in
a freshwater bath for two years

to get all the salt off it.
A symbol of Portugal's
royal coat of arms

helped scientists identify it.
They hope its discovery
will help them

understand more about
how ships navigated

in the 14th and 15th centuries.
[MUSIC PLAYING]
Heliskiing, using helicopters
to reach remote places to ski

has been around for decades.
As far as we know,
Zeppelin skiing,

using an airship to get
out in the back country,

is pretty new.
These three Austrian
skiers worked

on the idea for almost
two years before it

became reality in February.
They needed cold temperatures,
clear skies, and no wind.

They also needed to descend
by rope to the alpine summit

they intended to ski.
Was it worth it?
You'd better dirigibelieve it.
Of course, there were a
few blimps in the road.

Their path to success
wasn't always Zeppelinear.

And it took a while
before everything

was an airship shape.
Big dreams often
have steep slopes

and obstacles to traverse.
But once theirs
got off the ground,

despite the ropes
that repelled them,

they all clearly
had a descent time.

I'm Carl Azuz.
And we'll ski you later on CNN.
[THEME MUSIC]
コツ:単語をクリックしてすぐ意味を調べられます!

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CNN 10 | CNN Student News | March 20 2019

900 タグ追加 保存
Yukiko 2019 年 3 月 21 日 に公開
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