That depends on how much sleep you get but dreams leave fragile memories. They fade quickly.

这要取决于你一晚睡多长时间,梦境会留下一些若有若无的记忆，而且很快会淡忘。

耶鲁公开课 - 心理学导论课程节选

You can explain to the secretary that you woke up late and you had a terrible night because you fought with your wife.

你可以向你的秘书解释，你早上起晚了，昨晚你跟太太大吵一架，一整夜都没睡好。

I didn't 课堂 - SpeakingMax英语口语达人