Commutator compound
[化] 换向器(或整流器)润滑剂(由石蜡和蜂蜡制成)
🧩 词语组成解析
commutator
[['kɔmjuteitə]]
n. 换向器, 整流器\\n[化] 对易式; 整流器
🗣️ 情景例句
Are you involved in any extra-curricular activities on campus?
你在学校参加过任何课外活动吗？
I pick up my sister from her school.
我到学校接妹妹。
There is a new type of machine which can produce colour copies.
有一种新型的机器能够制作出彩色复印件。