他们来自不同的国家，又是不同的人种。
They come from the different nation, is a different human race again.
人们长期以来就普遍认可这样的观点，即不同的人种反映了不同的气候作用。
It had long been widely held that the varieties of humankind reflected the action of different climates.
因为在美国有很多不同的人种和民族，每种文化习俗都会把各自地方性的食物融合进美式菜肴的烹饪中。
Since there are so many ethnic minorities in America, every culture has contributed a bit of their local food to American cuisine.
在地球上先进种族与更为原始的种族相遇的历史并不十分愉快，而且相同的人种尚且如此，更何况与我们不同的外星生命呢。
The history of advanced RACES meeting more primitive people on this planet is not very happy, and they were the same species.
依赖于你的人种背景和你的饮食习惯，你的肠内将有不同类型的微生物群落。
Depending on your ethnic background and on your eating habits, you will have different types of microflora in your intestine.
头面型特征是体现人种典型差异的重要参数，即使在同一类头面型特征的人群中，不同个体的特征也千差万别。
Head features are very important parameters which embody difference among human race. Even in the colony that people have same type head features, they are different individually.
况且既然有大约4%不同人种的婚姻，如果你和别的肤色的人结婚，就连你祖父祖母都不会为之汗颜。
And now that something like 4% of all marriages are interracial, not even your grandparents will get lathered up if you marry someone of another color.
我们在不同人种的人成纤维细胞的倍增水平中测定成对子细胞的DNA含量。
We measured the amount of DNA on pairs of daughter cells at different population doubling levels of human fibroblasts.
我们在不同人种的人成纤维细胞的倍增水平中测定成对子细胞的DNA含量。
We measured the amount of DNA on pairs of daughter cells at different population doubling levels of human fibroblasts.
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