But we now have an obligation to them, and to their children, to control future immigration - as we have following previous immigration waves - to ensure assimilation, integration and upward mobility.

但是我们现在对他们有一个责任，对他们的孩子有一个责任，那就是控制未来的移民。跟踪过去的移民潮流，确保移民的同化，结合，和向上流动性。

youdao

What is more, the last great waves of aliyah, immigration to Israel, have ended.

此外，最近的一轮移居以色列（犹太人将以色列建国前犹太人回归故土巴勒斯坦的行动称为“阿利亚（Aliyah）”——译注）的“回归（aliyah）”大潮已经结束。

youdao

In the last 15 years. Vancouver has seen dramatic waves of immigration that have changed the face of your city in exciting ways: in art, architecture and fashion, for example.

在过去的15年里，温哥华经历了几次汹涌的移民大潮，城市面貌随之发生了令人振奋的变化，比如在艺术、建筑还有时装等方面。

youdao

And previous waves of immigration raise demographic challenges as a bulge of Latinos reaches college age.

ECONOMIST: As public universities struggle, some private ones thrive

One of the largest waves of immigration in our history took place little more than a century ago.

WHITEHOUSE: President Obama on Comprehensive Immigration Reform

Most Afro-Latinos arrived in this country by way of various waves of immigration.

NPR: The Music Of Africa, By Way Of Latin America