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[计] 后援文件
🗣️ 情景例句
when the dog scratched on the front door.
当那狗在抓前门时。
I'm up to my ears in work.
我忙死了。
Lined up against the wall, there were long thin wires attached to metal spheres.
靠墙排列着许多细长的电线，而电线又连着金属球。