during 是指「在...期間」或是「在...期間的時候」的意思。during 常常會跟一些介系詞搞混，例如while、in...等等。本篇文章教你during 的正確用法，以及與其他介系詞的差 …
如 the time 在定从中做主语、宾语时，用 which ，如： During the time which is unforgetable（在令 …
We use during before nouns and noun phrases to refer to when something happens over a …
一、 during which的用法. during which 相当于 during the time / the period / the course of …
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