We shouted in the valley, and in an instant, the echo came from the hillside with great distinctness.

我们在山谷里大喊，不一会儿，回声就清晰地从山坡上传来。

youdao

We shouted in the valley, and in an instant the echo came from the hillside with great distinctness.

我们在山谷中高呼，回声霎时间就从山腰上清晰地返回。

《新英汉大辞典》

That the surface's radiation cooling affects on the ground layer temperature inversion is presented as the relatively strong echo peak value corresponding to the temperature variety's valley value.

而地表的辐射冷却，对近地层逆温的影响，表现为较强的回波强度峰值，对应气温变化的谷值。

youdao