The republic is a melting pot of different nationalities.

该共和国是一个不同民族的大熔炉。

《柯林斯英汉双解大词典》

In a melting pot, who is black?

在巴西这样一个熔炉般的国家，什么样的人算是黑人？

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The state of Florida is a melting pot of many different cultures.

佛罗里达州是许多不同文化的大融炉。

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"The the United States is a melting pot of any nations you can name it on earth."

VOA: standard.2010.06.22

It's like a big melting pot of everything.

这里就像一个大熔炉，装下了一切的一切。

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Minn Myint Nan Tin, with the Burmese Advocacy Center,or BAC, says keeping this melting pot from boiling over is a delicate balancing act.

VOA: standard.2010.07.22

We are a melting pot, a mosaic of immigrants where competence is recognized and rewarded.

FORBES: Commentary

If she is living in a melting pot like New York, she is global on steroids.

CNN: African moms: Be patient with your unmarried daughters

Of course, London has always been a melting pot a point made in several recent studies of the city (see article).

ECONOMIST: Employment