to move one's ass
to do something very hurriedly, often used when demanding someone to move or leave quickly
[短语]
to beat the clock
to complete a task or achieve a goal before a deadline or a specific time limit
[短语]
shake a leg
said as a way of asking someone to begin doing something or continue doing it faster than before
[句子]
the clock is ticking (down)
used as a warning to remind one that the time that is left for doing something is about to be over
[句子]

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