最简单的表达:undertake the job
undertake: 承担, 担任
e.g. undertake a task 承担一项任务
take responsibility of....
be responsible for
有许多种说法：
（1）in charge of
The chief engineer was in charge of directing the building of the subway.
主任工程师担任指挥地铁的建造工作。
（2）be responsible for
The bus driver is responsible for the passengers safety.
（3）
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