文章首先研究了我国桑树的丰富资源和进行桑皮纤维开发的经济效应分析，得出了乐观的结论。

This article first studied the rich resources of mulberry and the economic effect in mulberry fibre, the conclusion was optimistic.

youdao

文章首先研究了我国桑树的丰富资源和进行桑皮纤维开发的经济效应分析，得出了乐观的结论。

This article first studied the rich resources of mulberry and the economic effect in mulberry fibre, the conclusion was optimistic.

youdao