Semioscillation
半(周期)振荡
🗣️ 情景例句
Well, I'd better be on my way.
好啦，我该走了呢。
There was a big choice of shops in the small town.
这个小镇上有好多商店可供选择。
only of metal, which wears away by friction.
而是由金属组成，而金属可以随着磨擦而磨损殆尽。