英语语法分析

The Washington Post reported, one of the main reasons, experts say, is that farmers have used herbicides on the milkweed plants that these butterflies feed on.

《华盛顿邮报》报道，专家说，主要原因之一是，农民对马利筋植物使用除草剂，而这些蝴蝶以马利筋植物为食。

Caterpillars of monarch butterflies feed exclusively on milkweed leaves.

黑脉金斑蝶的毛虫只吃马利筋的叶子。

Maize pollen is dispersed by the wind and often blows onto milkweed plants that grow near maize fields.

玉米花粉被风吹散，经常吹到生长在玉米田附近的乳草属植物上。