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
He must have loved her very much.
他一定非常非常地爱她。
I enclosed some photographs in my letter.
我在信封里装了一些相片。
Perhaps I' ll go to that one.
我也许会去听听那个报告。