研究人员经常进行复杂的研究来验证他们的假设。

Researchers often ___undertake complex studies to test their hypotheses.

政府必须进行全面改革以应对危机。

The government must ___undertake comprehensive reforms to address the crisis.

她决定攻读博士学位，这将花费数年时间。

She decided to ___undertake a PhD, which would take several years.