If you cover a baby's favorite toy with a piece of cloth, the baby thinks the toy has disappeared and stops looking for it.
如果你用一块布盖住婴儿最喜欢的玩具，他会以为玩具不见了，就不再找了。
2
When there's a fire, follow the teachers' instructions, leave the classroom quickly and use a piece of cloth to cover your mouth and nose so that you don't breathe in smoke.
发生火灾时，按照老师的指示，迅速离开教室，用一块布遮住口鼻，以免吸入烟雾。
3
If it is too cold, cover the arm with cloth first.