May 24, 20243、词组短语： at night 在夜里 last night 昨晚 in the night 在夜里 by night adv. 在夜里 all night 整夜 every night 每个夜晚 into the night 入夜；直到夜里 good night 晚安，再见 night sky 夜天. The origin of "at night" to indicate a point of time and the usage of prepositions "in" and"at" in olden times, when the time expression "at night" was originated, night might have been.
最好能多有几个例句。 更多相关的细节，可以参考 english language & usage stack exchange 上这篇帖子中最高赞的回答： meaning - at night or in the night?
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