that's because you were up all night drinking. up在这儿怎么讲?

that's because you were up all night drinking. up在这儿怎么讲?
that's because you were up all night drinking. up在这儿怎么讲?

that's because you were up all night drinking. up在这儿怎么讲?
be up all night=熬夜；熬通宵
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