我们已经落后了。
I have fallen behind in my work since last week.
从上周起，我在工作中落后了。
I have fallen behind the time, and am too old to catch it again.
我已经落在时间的后面了，我太老了，不能再赶上它了。
We have already fallen behind.
我们已经落后啦。
We have fallen hopelessly behind schedule.
我们没有希望按时完成计划。
We have fallen hopelessly behind schedule.
我们没有希望按时完成计划。
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