4. play a part (in) 扮演一个角色；参与
[典例]
1). She plays an active part in local politics. 她积极参与地方政治活动。
2). She played a major part in the success of the scheme. 她对该计划的成功起了重要作用。
[短语归纳]
take part (in sth)参加, 参与（某事物
the best part of sth（某事物的）绝大部分（尤指一段时间）:
for the most part 整体上; 通常; 多半
for my part就我来说
