This is called nesting or cocooning. Birds build nests out of sticks to hold their eggs and baby birds.

这就叫做筑巢或做茧。鸟儿用木棍来筑巢，让鸟蛋和小鸟生活在里面。

After cocooning itself inside the roach it emerges, fully grown.

在蟑螂体内结茧后， 它出现了，完全长大了。

This lake had laid frozen for many thousands of years, effectively cocooning its underwater environment from the outside world.

这个湖已经冻结了数千年，有效地将其水下环境与外界隔绝开来。

Some people enjoy spending a lot of time in their homes to make them nice places to live. This is called nesting or cocooning.

有的人喜欢长时间呆在家里，这样家就成了很舒服的地方，这就叫做筑巢或做茧。

So, the waves and the shore is around them, again, it's that cocooning feeling so we have this feeling of safety protectiveness with the image of the sea.

“海浪和海岸围绕着它们”，这是一种结茧的感觉，所以我们有一种安全保护的感觉，用大海的形象。