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動画の字幕をクリックしてすぐ単語の意味を調べられます!
単語帳読み込み中…
字幕の修正報告
Most of us think of the Sun as our friend.
It helps plants grow,
keeps us warm,
and who doesn't love to lie on the beach on a sunny day?
But for all of it's good qualities,
the Sun can also be harmful in large amounts.
That's why we invented sunscreen.
The purpose of sunscreen is to shield the body
from the Sun's ultraviolet rays,
which have several harmful effects,
including sunburn,
aging,
and skin cancer promotion.
These rays are separated
by their different wave lengths,
into types such as UVA
and UVB,
which exert a variety of effects in the skin
due to the absorption patterns of chromophores,
the parts of the molecules
responsible for their color.
The primary two chromophores are hemoglobin,
found in our red blood cells,
and melanin, which gives our skin its pigment .
We know that UVB rays cause the skin to burn.
The role of UVA rays is less well understood
and appears to have an effect
on our tanning response,
carcinogenesis,
and aging.
So, how does the sunscreen protect us from these rays?
There are two basic types of sunscreen,
physical and chemical blockers.
Physical blockers, like zinc oxide
or titanium dioxide,
reflect the Sun's rays by acting as a physical barrier.
If you've seen lifeguards with noses covered in white,
then you know what this looks like.
The same ingredients are primary components
of diaper creams,
where the goal is also to create a physical barrier.
Historically, they haven't always been easy to apply
and were conspicuously visible on the skin,
but new formulations have made this less of an issue .
Chemical blockers, on the other hand,
absorb the Sun's rays.
They deteriorate more quickly than physical sunscreens
because their ability to absorb the Sun diminishes.
Generally, these are more transparent
when rubbed on the skin,
but some people develop allergic reactions
to some of the chemicals.
Regardless of the type of sunscreen,
all are subjected to testing
to determine their sunburn protection factor,
or SPF.
This is essentially a measure of the protection
that the sunscreen will provide from UVB rays before one begins to burn.
But even if you don't burn,
you still need to use sunscreen
because unless you live in a cave,
you're not immune to the effects of the Sun.
It is true that darker skinned people
and those who tan easily
have more built-in protection from sunburns,
but they are still vulnerable to the effects of UVA.
Children under the age of six months, on the other hand,
should have almost no sun exposure
as their protective mechanisms
are not fully functioning,
and their skin is more likely to absorb
any sunscreen that is applied.
Wearing sunscreen helps protect
against the development of all three types of skin cancer:
basal cell carcinoma,
squamous cell carcinoma,
and melanoma.
On a daily basis, the DNA in your cells
is developing mutations and errors
that are generally handled
by machinery within your cells,
but ultraviolet rays from the Sun lead to mutations
that the cell may not be able to overcome,
leading to uncontrolled growth
and eventual skin cancer.
The scariest thing about this
is that usually you can't even see it happening
until its too late.
But if these concrete risks to your health
are not enough to convince you to use sunscreen,
there are aesthetic reasons as well.
Along with cigarette smoking,
sun damage is the leading cause of premature aging.
Photoaging from chronic sun exposure
leads to a loss of elasticity in the skin,
in other words, making it look saggy.
Take a look at this truck driver
who's left side was chronically exposed to the sun
and notice the difference.
This is an important point.
Car windows block UVB, the burn rays,
but not UVA, the aging rays.
It is recommended to use sunscreen daily,
but you should pay special attention
before prolonged sun exposure
or when at the beach
or among snow
since the reflectivity of water and ice
amplifies the Sun's rays.
For these cases, apply about an ounce
fifteen to thirty minutes before you go out and once again soon after you get outside.
After that, you should reapply it every two to three hours,
especially after swimming or sweating.
Otherwise you should wear protective clothing
with ultraviolet protection factor, or UPF.
Stay in shaded areas,
such as under trees or an umbrella,
and avoid the sun at the peak hours
of 10 a.m. to 4 p.m.
And what's the best kind of sunscreen?
Everyone will have their preference,
but look for the following things:
broad spectra,
SPF of at least 30,
and water-resistant.
A light moisturizer with SPF 30
should be good for daily use.
Take note if you decide to use a spray.
They take several coats to effectively cover your skin,
like painting a wall with a spray can
versus a paint brush.
So, enjoy the sun,
but enjoy it with sunscreen.
コツ:単語をクリックしてすぐ意味を調べられます!

読み込み中…

読み込み中…

【TED-Ed】なぜ私たちは日焼け止めを使うのか(【TED-Ed】Why do we have to wear sunscreen? - Kevin P. Boyd)

54877 タグ追加 保存
VoiceTube 2018 年 4 月 21 日 に公開    VoiceTube Japan 翻訳    Kana kawai チェック

概要

続きを読む
だんだん暖かくなってきて、空も晴れ渡ってきました。一年のうち、もっとも外に出て太陽の光を浴びるのに適した季節が今です!東アジアでは一般的に皮膚が白ければ、肌の他の問題を隠せると信じられています。なので、みんなとても真剣に日焼け止めを塗っています。しかしこのような迷信によっは、肌の白さを気にしていない人は日焼止めを塗らなくなってしまいます。これはとでも恐ろしい間違った考えですよ。それでは、なぜ絶対日焼け止めを塗らなくてはいけないのか私たちと一緒に見ていきましょう!

1promotion0:31
promotion ここでは「促す」という意味です。
Cultural exchanges lead to the promotion of better relations between nations.
文化交流は国家間のよりよい関係を促す。


もっとより一般的な使われ方をする時、promotion は「昇進」を意味します。
There is little chance for promotion in this company.
この会社で昇進する機会は多くない。


promotionは「販売促進販売促進キャンペーン」という意味もあります。
There are usually many promotions around public holidays.
通常、祝祭日には多くの販売促進キャンペーンがある。


2pigment 0:52
pigment は生物学上「色素」や「黒色色素」を指します。
Albinism in humans is a medical condition characterized by the lack of pigment in the hair, skin, and eyes.
人のアルビニズムは、毛髪、皮膚、および目に色素がないことが病状の特徴である。


pigmentは「粉状の顔料や着色料」でもあります。
Different pigments are used to give color to stained glass.
異なる顔料はステンドグラスに色を与える。


固体に近いものは pigment,液体状の「染料」はstrong>dyeになります。
In the past, only the royalty wore purple, because natural purple dyes were rare and expensive.
過去、天然の紫色染料は希少で高価だったため、貴族だけが紫色を着ていた。


3issue 1:35
issue はここでは「問題・難題」という意味です。
The Israeli-Palestinian conflict is a very compliated issue.
イスラエルとパレスチナの紛争はとても複雑な問題だ。


issueは「発行物(雑誌・新聞などの)…号」にも使えます。
Upon the release of latest issue of National Geographic, the editor-in-chief published a highly-publicized piece admitting to the magazine's racism in the past.
「ナショナルジオグラフィック」の最新号がリリースされた時点で、編集長は過去に人種差別的内容があったことを認めた記事を発表した。


4allergic 1:51
allergic の意味は「アレルギーの」。
I am allergic to eggs.
私は卵に対してアレルギーがある。


「アレルゲン」はallergenです。
Though not on the list of ingredients, this product may still contain traces of allergens.
成分リストには記載されていませんが、この製品には依然として微量のアレルゲンが含まれている可能性がある。


また、「アレルギー症状」はallergyです。
Many children living in polluted cities suffer from allergies.
汚染された都市に住む多くの子供たちは、アレルギーに苦しんでいる。


5essentially 2:01
essentially は basically と同義語で,意味は「基本的に」です。
Authentic baguettes are essentially made with only four ingredients: water, flour, salt and yeast.
本場のバゲットは基本的に水、小麦粉、塩、酵母の4つの成分から作られています。


形容詞としてessential を使うときは「必須の」という意味になります。
Water is essential to survival.
水は生きていくのに必要不可欠だ。


この動画を見て、日焼け止めの大切さがお分かりいただけたと思います。今年の夏は健康的に太陽の光を楽しめますように!

文/ Rachel Kung
訳/ Luna Lin

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