動詞 blow off:

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

1. Parents must let children blow off steam sometimes.
   做父母的有時必須讓孩寸們吵吵鬧鬧，發(fā)泄發(fā)泄。
2. The speaker has to ad- lib his speech when his papers suddenly blow off the podium.
   當(dāng)演講稿突然掉下臺時，演講者不得不現(xiàn)編詞。