The report was badly researched and quite inaccurate.

这报告没有经过认真调查，相当不实。

All these issues have been extensively researched in recent years.

所有这些问题近年来都得到广泛地研究。

The nuclear industry was required to prove that every operational and safety aspect had been fully researched.

核工业需要证明每一个操作和安全项目都已全面调查过。

This is a well researched and very readable book.

这是一本研究深刻、可读性强的书。

The lads searched and researched this place, but in vain.

小家伙们一遍遍地搜索了这个地方，但没有找到。