undertook的中文翻译是什么意思

He also undertook to earmark $ 235 billion in government expenditure on infrastructure projects within five years.

同时承诺在五年内投资二千三百五十亿元进行基建.

Examine on the spot wait for a form, undertook comparative detailed investigation, reached relatively unanimous verdict.

实地查看等形式, 进行了比较具体的调查, 得出了较为一致的结论.

It undertook eight operations in 1998.

一九九八年内,该中心共执行了八次紧急任务.

For this, structure of beautiful to tennis shoe roller undertook improvement.

为此, 对网球鞋花辊结构进行了改进.取得了较好的效果.

He undertook for her security.

他保证她的安全.