operation

US /ˌɑpəˈreʃən/

UK /ˌɒpəˈreɪʃn/

A2 初級TOEIC
n. (c./u.)名詞 (可算/不可算)運営 : 事業
His operation has been in business for 30 years
n. (c./u.)名詞 (可算/不可算)働き
The lights are in operation now, so thank you for fixing them
n. (c./u.)名詞 (可算/不可算)手術
I had an operation to fix my broken leg
n. (c./u.)名詞 (可算/不可算)作戦
The military launched a large-scale operation to secure the border.
n. (c./u.)名詞 (可算/不可算)運転
The operation of the machine requires careful attention to detail.
n. (c./u.)名詞 (可算/不可算)演算
Addition is a basic arithmetic operation.

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