His book explains the theory for the lay public.

他的书为大众阐明了这个理论。

《牛津词典》

A book lay spread on the sill before her, and the scarcely perceptible wind fluttered its leaves at intervals.

她面前的窗台上摊着一本书，几乎觉察不到的风不时地吹动着书页。

youdao

The book lay open on the table.

书摊开在桌子上。

《牛津词典》

Finally, I put the book aside and lay gazing upward into darkness.

NEWYORKER: Rat Beach

Mr Weeks did not have sales in mind when he decided to close his book with a discussion of lay ethnography.

ECONOMIST: But who's complaining?

While the maths may at times prove too technical for the lay reader, the strength of the book lies in its many individual stories and case histories.

ECONOMIST: Science and the Nazis