Commutators
(commutator 的复数) n. 换向器, 整流器\\n[化] 对易式; 整流器
🗣️ 情景例句
or are you refinancing your present home?
还是原有的房子重新申请贷款？
We need more staff in the office.
我们办公室需要增加人手。
In answer to these questions I either nodded or made strange noises.
作为对这些问题的回答，我不是点头，就是发出奇怪的声音。