《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。
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.
华盛顿邮报作家YukiNoguchi 对此文有贡献。
Washington Post staff writer Yuki Noguchi contributed to this report.
《华盛顿邮报》专栏作家凯文·布莱克斯通将与我们一起讨论这项研究的发现。
With us to talk about the findings in the study is Washington Post columnist Kevin Blackistone.
《华盛顿邮报》专栏作家凯文·布莱克斯通将与我们一起探讨这项研究的发现。
With us to talk about the findings in the study is Washington Post columnist Kevin Blackstone.
不久之后，她嫁给了菲利普·格雷厄姆，后者接替了他岳父的职位，成为《华盛顿邮报》的出版人。
She married Philip Graham who took over his father-in-law's position shortly after and became publisher of The Washington Post.
不久之后，她嫁给了菲利普·格雷厄姆，后者接替了他岳父的职位，成为《华盛顿邮报》的出版人。
She married Philip Graham who took over his father-in-law's position shortly after and became publisher of The Washington Post.
应用推荐