VOA慢速英语:Why Getting Dirty Can Be Healthy for Children

短语讲解：

1. A new study suggests that early exposure to germs strengthens the immunesystem.

exposure to 显露；曝光
例句：Exposure to the air will lead to erroneous results. 
若把样品暴露在空气中，测定结果会有很大误差。 

2. That means letting children get a little dirty might be good for theirhealth later in life.

be good for 有益于;适于
例句：It's good for every day. It will be good for school, Michelle. 
这套衣服每天都可以穿。它适合上学时穿， Michelle。

3.  It found that adult mice raised in a germ-free environment were morelikely to develop allergies, asthma and other autoimmune disorders.

be likely to 可能；倾向于
例句：She and Mr. Gryce would not be likely to hit it off. 
她和古莱先生不见得合得来。 

4. "I think one obvious question, for example, that’s raised by thesestudies is the early life use of antibiotics and whether we need to be morecareful in their prescribing."

for example 例如
例句：Many great people rose from poor backgrounds -- Lincoln for example.
很多伟人出身贫寒,林肯就是一例。