Mobile sources
[经] 机动的来源
🧩 词语组成解析
n. 输入源；发起者；来源（source的复数）
🗣️ 情景例句
We think it might be just right for ten- to twelve-year-olds.
我们想它或许对十岁到十二岁大的孩子正合适。
Excuse me, I'd like to ask you a question.
对不起，我可以问个问题吗？
We'd better take it up with them, in that case.
如果是那样，我们最好向他们提出来。