During的意思是:在……期间,在……的时候。
例句:
I will visit you during the summer vacation. (暑假期间我会去看你。)
The company is expanding during the economic recovery. (在经济复苏期间,这家公司正在扩大规模。)
The baby was sick during the whole week. (宝宝一整周都在生病。)
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