not less than a certain amount or number
You need to drink at least eight glasses of water every day.
你每天至少需要喝八杯水。
used to indicate that something is the minimum that should be done
At least try to finish your homework before going out.
至少试着在出门前完成你的作业。
used to highlight a positive aspect in a generally negative situation
The hotel was far from the beach, but at least the rooms were clean.
酒店离海滩很远,但至少房间很干净。
used to soften a statement or make it less definite
I think I've solved the problem, at least, that's what I hope.
我想我已经解决了这个问题,至少,这是我希望的。