A fake university established as part of a sting operation to expose student visa scams has netted 21 suspects in mass arrests carried out by American immigration authorities.

美国移民当局的一个卧底行动——通过建立假大学以揭露学生签证诈骗并进行大规模逮捕，该行动逮捕了21名犯罪嫌疑人。

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Above all, I want to get the policy right: good immigration, not mass immigration.

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One need only recall the mass immigration of eastern European Jews who arrived destitute.

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Mass immigration from European countries with a strong socialist movement swelled the ranks of the radical unions.

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