Scientists learn about monarch butterflies migration by capturing and placing identifying tags on the insects.

科学家通过捕捉帝王蝶并在它们身上贴上识别标签来研究它们的迁徙的。

The national band played for the visiting monarch.

国家乐团奏给来访的帝王听。

All through history, we've seen royal families, powerful people, emperors, have collections of animals.

纵观历史，我们看到皇室、有权势的人、帝王，都有动物收藏。

One of the most famous Stoic writers was also one of Rome's greatest emperors.

最著名的斯多葛派作家之一，同样也最伟大的帝王之一。

The differing opinions about monarchs draw on different data.

关于帝王蝶的不同观点来自不同的。

But yeah, " Monarch." Okay, yes. - Yeah, so... - Complex organization.

但确实，《帝王计划》。好的，对。- 的，所以… … - 组织复杂。

But were they portraits of the emperor's soldiers?

它们究竟帝王战士的肖像？

For example, monarch butterfly caterpillars can fit on a pencil eraser when they hatch.

例如，帝王蝶毛虫孵化时可以放在铅笔橡皮擦上。

Under the surface, in China's heart, these warriors still await command.

大地之下，在中国之心深处，这些勇士仍在等待着帝王的号令。

The year after that the survey recorded 335,479 monarchs.

在那之后的一年，调查记录了335479只帝王蝶。

Monarch butterflies are known for their clear orange-and-black markings.

帝王蝶以其清晰的橙黑色斑纹而闻名。

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。

Monarch butterflies are known for their clear orange-and-black markings. They live across North America.

帝王蝶以其鲜明的橙黑相间斑纹而闻名。它们生活在北美洲各地。

There's a sense of regal dignity and mirth, levity and gravitas.

这里有一种帝王般的荣誉，欢乐、轻松和庄严的感觉。

The average monarch lives about nine months.

帝王蝶平均能活大概九个月。

Those data show an 85 percent drop since the mid-1990s.

这些显示，自 20 世纪 90 年代中期以来，帝王蝶的量下降了 85%。

So, if you plant more of this, you get more monarchs, and monarchs are currently endangered.

所以，如果你种植更多的这种植物，就会得到更多的帝王蝶，而帝王蝶目前正濒临灭绝。

These plants can help give monarchs the energy they need for their yearly migration in autumn.

这些植物可以帮助提供帝王蝶在秋季进行年度迁徙所需的能量。

This can make it harder for monarchs to know when it is time to migrate.

这可能会让帝王蝶不确定迁徙的时间。

Monarchs in the eastern United States spend the winter in Mexico.

美国东部的帝王蝶在墨西哥过冬。