VOA慢速英语:Looking for Answers to Asthma

短语讲解：

1. And it says the disease affects people in all countries around the world and at every development level.

in all 总共
例句：We were fifty in all.
我们总共五十人。

2. They say it feels as if someone is sitting on them.

as if 犹如;好像
例句：She treats him as if he were a stranger.
她待他如陌生人。

3. The disorder can severely limit a person's activity, and evenlead to death.

lead to 导致
例句：Smoking can lead to lung cancer.
抽烟可能导致肺癌。

4.  Pollen is a fine dust that comes from grass, trees andflowers. Mold is a kind of fungus.

come from 来自
例句：Ambient noise may come from any direction. 
外界噪声可以来自任意方向。 

5. People should know the causes of their asthma symptoms and tryto avoid these triggers.

try to do 表示尽自己最大能力做某事
例句：From now on I will try to do better. 
从今以后我要努力去做。 

6. They should go to the doctor for medical examinations even ifthey are feeling fine.

even if 即使
例句：Even if we never fix it, we somehow survive. 
即使我们从来不改正它，有时也没有问题。