曾在陆地上生活过的动植物的遗体被保存下来的更为罕见。

The remains of plants and animals that lived on land are much more rarely preserved.

http://dict.qeto.com

现在，因为沧龙-巨蜥的祖先-是蛇进化时周围唯一的海洋蜥蜴，所以蛇应该是从在陆地上生活的蜥蜴进化而来。

Now, because the mosasaurs– the monitor lizards' ancestors–were the only marine lizards around when snakes evolved, snakes must have evolved from lizards living on land.

en.dict.cn

两栖动物既能在水中生活，也能在陆地上生活。

Amphibians could survive in the water as well as on land.

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