Translation of "Research" into Chinese

Research on the causes of cancer is very expensive.

有關癌症成因的研究耗費頗巨。

I'm doing some history research and would like to ask you a few questions.

我正在做一些历史研究工作,想问您几个问题。

UNEP also catalyses and makes use of targeted scientific research towards improved environmental information management in decision-making.

环境署还推动和利用有针对性的科学研究工作,以改进决策过程中的环境信息管理工作。

The results of the research were quite satisfactory.

調查的結果十分令人滿意。