blow off

动词 blow off:

1. come off due to an explosion or other strong force

1. Parents must let children blow off steam sometimes.
   做父母的有时必须让孩寸们吵吵闹闹，发泄发泄。
2. The speaker has to ad- lib his speech when his papers suddenly blow off the podium.
   当演讲稿突然掉下台时，演讲者不得不现编词。