~ to do sth |~ that… to agree or promise that you will do sth 承诺；允诺；答应
He undertook to finish the job by Friday.
他答应星期五之前完成这一工作。
~ sth to make yourself responsible for sth and start doing it 承担；从事；负责
to undertake a task/project
承担一个任务／项目
University professors both teach and undertake research.
大学教授既要教学又要从事研究工作。
The company has announced that it will undertake a full investigation into the accident.
to promise that you will do something:
[ + to infinitive ] She undertook not to publish the names of the people involved.
[ + that ] The government undertook that the buildings would not be redeveloped.
undertake verb [T] (IN VEHICLE)
noun
a task or project, especially one that is important and/or difficult SYN venture
He is interested in buying the club as a commercial undertaking.
他有意购买那个俱乐部作为投资。
In those days, the trip across country was a dangerous undertaking.
那个时期，越野旅行是一件危险的事情。