4周搞定2000+托福核心词
耕作；教养
cultivation
常考释义
While it is unknown just how much of this is true, it is certainly known that silk cultivation has existed in China for several millennia.
虽然这个故事有多少真实性是未知的，但是很确定的是，养蚕业已经在中国存在了几千年。
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