America has a very heterogeneous population.

美国人口是由不同种族组成的。

Cancer has long been viewed as a heterogeneous population of cells.

长时间以来，人们认为肿瘤由异质性肿瘤细胞群构成。

The population of the United States is vast and heterogeneous.

美国人口众多，人种混杂。