undertake US: [.ʌndər'teɪk]   UK: [.ʌndə(r)'teɪk]  
词性变化: undertakes undertaking undertook undertaken undertakes

1. 〔古语〕担保,保证,负责,做证人;应承,约定
2. 承担;承办;答应,约定
3. 〔口语〕承办丧事
4. 断言
5. 着手,从事
She had been wondering what research she should undertake in order to gain her Doctorate.
她一直思来想去,为了取得博士学位,应该从事什么研究。

例句
1.Both sides undertake to facilitate further cultural exchanges.
双方承诺为进一步开展文化交流创造便利条件。

2.We cannot undertake to do that.
我们不能担保做那件事。

3.Their team will undertake exploration for oil.
他们队将着手进行石油勘探工作。

4.I repeat that I cannot undertake the task.
我再说一遍,我不能承担这项任务。

5.At first we could only undertake repair jobs.
开始时,我们只能干修理活。

6.Roosevelt was reluctant to undertake the thankless task.
罗斯福不大愿意承担这种徒劳无益的任务。

7.The Countess announced her willingness to undertake this feat.
伯爵夫人宣称,她决心实行这一壮举。

8.You are ignorant of the duties you undertake in marrying.
你完全不懂你在婚姻方面所应承担的责任。

9.We must therefore resolve to undertake the most difficult tasks.
因此,我们必须下决心从事最艰苦的工作。

10.Girls as well as boys eagerly undertake these difficult studies.
不但是男孩子,女孩子也热衷于攻读这些困难的学科。