fold up
  塌下,垮掉;放棄,撒手;倒閉
  fold up
       v 1: bend or lay so that one part covers the other; "fold up the
            newspaper"; "turn up your collar" [syn: fold, turn up]
            [ant: unfold]
       2: become folded or folded up; "The bed folds in a jiffy" [syn:
           fold]