1.There are many advantages to+V-ing ……有很多好处/优点
例句：There are many advantages to doing aerobics.
做有氧运动有许多好处。

2.have difficulty+(in) V-ing 从事/做……有困难
例句：Ben has difficulty breathing in Taipei City.
本在台北市呼吸困难。

3.To begin with, S+V 首先，……
例句：To begin with, you should read this book on bow to get along with others.
首先，你必须读这本如何与人相处的书。

4.firsthand information 第一手的资料
例句：A witness is simply one who reports what he has seen and heard. He shares personal knowledge and firsthand information.
见证人就是向人说明自己的所见所闻，与人分享他的亲身经历和第一手资料。