VOA慢速英语:Learning First Aid: What to Do Until Medical Help Arrives

1. The American Academy of Pediatrics says some poisons can cause additional damage when they come back up the throat.

come back 回来
例句：She came back two hours later.
她两小时后回来了。

2. Find a hard surface like a chair and rest your body on it. Then push your closed hand in and up.

hand in 提交;呈送
例句：I do not know when she can hand in her school assignment. 
我不知道她什么时候能交来她的作业。 

3. He strongly urges people in contact with a victim to take action.

in contact with 与...联系
例句： I have kept in contact with my mother by telephone for many years. 
许多年来我一直与母亲保持电话联系。 

4. Defibrillators use electric shocks to correct abnormal heartbeats that can lead to sudden death.

lead to 导致
例句：Mass unemployment may lead to social upheaval. 
大批失业会导致社会动乱。 

5. Dr. Beck worked at what is now called Case Western Reserve University School of Medicine in Ohio.

work at 从事
例句：I'm applying to work at the library. 
我在申请图书馆管理员的工作。

6. But be sure not to burn the skin.

be sure 确信的，有把握的
例句：Can I be sure of a profit if I invest? 
我要是投资, 肯定能获利吗?