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。
2
She put a small piece of it in her mouth.
她把一小块放进嘴里。
3
She had scarcely put the piece into her mouth, when she fell down dead upon the ground.