1. She undertook to pay back the money within six months.
   她答应在6个月之内还清欠款。
2. I can't undertake that you will make a profit.
   我不能保证你会获利。
3. What we are undertaking now is an entirely new endeavour.
   我们现在干的事业是全新的事业。
4. He undertakes a piece of work.
   他从事着一项工作。
5. He joined with me in the undertaking.
   他和我共同承担此事。

　2个名词解释