pull down
问题描述：
pull down
答
pull down
['pul dɑun]
【拉下】
He tried to the pull down the zipper normally.
他试着以正常方式拉下拉链.
Pull the cord in case of emergency.
发生紧急状况时,拉下翼弦.
【拆毁】
They have managed to pull down the old building.
他们已拆毁了那幢旧建筑.