be a part of

one of the pieces, sections or segments that something is made up of
一部分，一份
The best part of his job is all the travel it includes.
他的工作大部分是東奔西跑，到處出差。

《新視野大學(xué)英語詞匯講解第478期:be a part of》永久閱讀地址: http://www.jiazhineng.cn/yingyu/5737/