换草
换草-
“换草运动”其实就是熟人召集的相亲会，这里的“草”指年轻男子。
The term " acquaintance blind date " literally means " exchanging grass ", with grass referring to young men .
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还要定时清粪，另换垫草，适当减小饲养密度。
Also timing dung , and another clear mat grass , reduce the breeding density appropriately .
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论以粮换林换草与河西地区的可持续发展&以武威地区为例
Study on exchanging tree and grass with grain and sustainable development in Hexi region & taking Wuwei Prefecture as a case