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1.To make yourself responsible for sth and start doing it
To undertake a task/project
University professors both teach and undertake research.
2. To agree or promise that you will do sth承诺
He undertook to finish the job by Friday.
-undertaker:殡葬承办人，殡仪服务员
-undertaking（n.）：（重大或艰巨的）任务，项目，事业
He is interested in buying the club as a commercial undertaking.
an idea or a principle that is connected with sth.
the concept of social class 社会等级的概念
I can’t grasp the basic concepts of mathematics.
-concept album: a collection of pieces of popular music, all having the same theme and recorded on the CD, etc.
-conception (n.):
1. the process of forming an idea or a plan构思；构想
The plan was brilliant in its conception but failed because of lack of money.
2. an understanding理解
He has no conception of how difficult life is if you’re unemployed.
-conceptual (adj.): a conceptual framework 概念框架
severe penalties were meted out by the court.
法庭判定予以严惩。
