The report is underpinned by extensive research.

这份报告以广泛的研究为基础。

Extensive research has been done into this disease.

对这种疾病已进行了广泛研究。

He has carried out extensive research into renewable energy sources.

他已经对再生能源进行了广泛研究。

After extensive research, Albert Hoffman first succeeded in synthesizing the acid in 1938.

经过大量研究之后，艾伯特·霍夫曼于1938年首次成功合成了迷幻剂。

Remember that most decisions don’t require extensive research

记住，大多数决定不需要过多的研究。