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
The first word is snow.
第一个字是"snow。
I often listen to the radio at night.
我常常在晚上听收音机。
I went downstairs and sat in front of the television pretending to read.
便来到楼下坐在电视机前假装看书。