She's looked on as the leading authority on the subject.

她被视为这门学科最重要的权威。

And one leading authority says that these intensely powerful mental events can be not only harnessed but actually brought under conscious control, to help us sleep and feel better.

一位权威人士说，这些影响力格外强大的心理事件不仅可以被控制，而且可以被我们有意识地控制，帮助改善睡眠，让我们感觉更好。

He is a leading authority on plant diseases.

他是植物病虫害方面的最高权威。

Mr Li is a leading authority on Chinese food.

李先生是中国食物方面的一流权威。

Become a leading authority on your chosen subject.

在你所选择的领域做个权威。