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一下

Source : CEDICT

(used after a verb) give it a go/to do (sth for a bit to give it a try)/one time/once/in a while/all of a sudden/all at once

Source : CEDICT

(used after a verb) give it a go/to do (sth for a bit to give it a try)/one time/once/in a while/all of a sudden/all at once