Although polyculture had not caught on in Japan fish culturists there were producing fry of grass carp and silver carp for export.

日本当时虽不时兴混合养殖，但养殖者却生产草鱼和鲢鱼鱼苗出口。

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Farms that use polyculture, however, not only enlist crops to protect each other from pests, but can also still rely on the surviving crops if one is killed by disease.

然而，采取混种方式的农场里，不仅可以让作物们协同作战防护病虫害，在某种作物遭虫害减产时可以转而倚赖其他存活的作物取得收成。

youdao

Farms that use polyculture, however, not only enlist crops to protect each other from pests, but can also still rely on the surviving crops if one is killed by disease.

然而，采取混种方式的农场里，不仅可以让作物们协同作战防护病虫害，在某种作物遭虫害减产时可以转而倚赖其他存活的作物取得收成。

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