The other thing is in versus out migration.

另外一件要考虑的就是迁移。

De Bellis said there are constituencies that believe Europe is under siege from migration.

德·贝里斯说，有些民认为欧洲正被难民“围攻”。

The construction of the Three Gorges Project entails large migration.

三峡工程建设需要大规模移民。

For most, this momentous migration is their first.

对于大多数来说，这次迁徙是他的处女旅。

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

科学家是通过捕捉帝王蝶并在上贴上识别标签来研究的迁徙的。

You've just participated in the world's largest migration.

你刚才就参与了世界上最盛大的洄游现象。

For example, with migration, new hyphenated identities and ethnicities can occur.

，随着移民，可能会出现新的连字符份和种族。

Critics say that has led to a surge in illegal migration.

批评人士指出，这导致了非法移民的激增。

This year's migration is already well under way.

蝶群早已踏上今年迁徙的旅程。

We're also tackling illegal migration and stopping criminals from abusing our asylum system.

我也在处理非法移民问题，阻止罪犯滥用我的庇护制度。

There have been arguments over financial regulations, bailouts and different approaches to migration.

关于金融监管、紧急援助和不同的移民方法，一直存在争议。

This illiberal turn in attitudes to migration is no surprise.

对移民的态度转为不开放不足为奇。

The birds also tend to stop their migration following a full moon.

欧夜鹰在满月之后还倾向于停止迁徙。

For decades, the United States has dealt with migration challenges here in the Western Hemisphere.

在过去的数十年内，美国一直在试图解决西半球内来自移民的挑战。

So how can we make migration work better for everyone?

那么我何才能让移民更好地为每个人服务呢？

C) A lot more refugees die during migration.

C）更多的难民在移民过程中死亡。

Their forced migration to Oklahoma became known as the Trail of Tears.

被迫来到俄克拉荷马州的迁徙之路有了一个名字--眼泪之路。

But it remains a powerful symbol of America's westward migration that continues to this day.

但是时至今日一直是美国西进移民时期的一个有力象征。

They are worried that doing so would make the migration problem worse.

他担心这样做会恶化移民问题。

The fall migration of wild birds sent avian flu cases spiking again.

秋季野生鸟类迁徙使得禽流感病再次激增。