What we find is that the monarchs strongly prefer the medicinal milkweed.

我们发现帝王斑蝶偏好药性乳草。

The problem is there are different types of milkweed.

问题是乳草有很多种类。

Young butterflies in the form of caterpillars depend on milkweed.

毛毛虫形状的小蝴蝶以马利筋为食。

Decker say these findings are not just about butterflies and milkweed.

德克尔表示，这些发现不仅仅与蝴蝶和马利筋有关。

" There are things people can do to help, " she said, including planting milkweed.

“人们可以做一些事情来帮助它们，”她说，包括种植马利筋。

Drier weather in the U.S. West, driven by climate change, means less milkweed for butterflies to eat, Wagner said.

瓦格纳说，受气候变化影响，美国西部气候更加干燥，这意味着可供蝴蝶食用的乳草减少。

It is important to choose the right kind of milkweed.

选择正确的马利筋种类是很重要的。

She said not all milkweed is the same.

她说，并不是所有的马利筋都是一样的。

At her Virginia home, Katherine Dietz already grows three types of native milkweed, food for hungry monarch caterpillars.

凯瑟琳·迪茨在弗吉尼亚州的家中已经种植了三种本地乳草，它们是饥饿的帝王毛虫的食物。

At her Virginia home, Kathryn Dietz already grows three types of native milkweed, food for hungry monarch caterpillars.

在她弗吉尼亚州的家中，凯瑟琳·迪茨已经种植了三种当地的乳草，这是黑脉金斑蝶幼虫饥饿时会吃的食物。