She smiled. - 'This is the forest primeval,' he said.

——这里是原始之林，他说。

youdao

The railway cuts through a primeval forest.

铁路穿越原始森林。

《新英汉大辞典》

To the Wuxuhai spot must go through a primeval forest, both road sides have many ancient pines and cypresses, with a felling of very long time, seemed to be in those ancient centuries.

到伍须海需要穿过一片原始森林，沿途有很多参天的老松和古柏，给人年代久远的感觉，仿佛置身上古世纪。

youdao

Once we abandon the bookstore for the virtual world we find that it is a primeval forest, dangerous and uninviting, replete with frauds and scams looking to scrape a quick buck off of unsuspecting readers.

FORBES: Why Public Libraries Matter: And How They Can Do More