蜘蛛不适宜大规模养殖，而且由于蜘蛛多为微小的生物，所以它们产出的蛛丝不足以用于大规模生产。

Spiders do not take well to farming, and as they are mostly teeny little creatures, they don't produce enough silk to be useful in large-scale production.

youdao

一是提高奶牛标准化规模养殖水平。

First, to enhance the standardized and scale production.

youdao

因此，建立高效率的青饲料供应体系已成为奶牛规模养殖企业的迫切需求。

Therefore, establishing high-efficiency green forage supply system has become the active demand of cows scale enterprises already.

youdao