“结茧”造句

这就是所谓的筑巢或结茧.
This is called nesting or cocooning.

长期的行军使他的脸上结茧了.
The long march had callused his feet.

桑蚕取食桑叶后吐丝结茧, 然后钻出茧壳羽化为蛾.
Leaves after feeding silkworm cocoon silk knot, and then drilled for the moth eclosion cocoon shell.