degrade

这些有机废物在堆肥中会自然降解。

The organic waste will naturally ___degrade in the compost.

老师不应该在课堂上贬低学生的能力。

Teachers should not ___degrade students' abilities in class.

长时间暴露在阳光下会让这种塑料材质逐渐降解。

Long exposure to sunlight will gradually ___degrade this type of plastic material.