回收(东西以便再利用):recycle All glass bottles which can't be refilled can be recycled.所有不能再次装用的玻璃瓶子都可以被回收利用。回收/收回(说过的话):take back Even four horses cannot take back what one has said.一言既出,驷马难追.I take back what I just said.我收回我刚才说的话.