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
Are you free?
您有空吗？
That is a very agreeable idea.
那是很棒的创意。
but I lacked for nothing, for he was both father and mother to me.
但我却什么都不缺，他既当父亲又当母亲。