or if they were all under 24 or if they were all black or whatever, you need to know if the sample chosen is representative of the population as whole.

或者如果他们都在24岁以下,如果他们都是很人，或者怎么样，你要知道如果选择的样本,是否能够代表整个人群。

youdao

We don't have that kind of huge black hole nearby — fortunately for us — so we can't grab a sample to study.

在我们附近没有这种巨大的黑洞(我们应当感到幸运才对)，所以我们抓不到研究的样本。

youdao

Quality: Our Sample No. 265, black, assorted sizes.

品质：我方样品265号，黑色，配合尺寸。

youdao

On average, the Asian Americans in the sample had 0.69 long genes, the black Americans had 1.47 and the white Americans had 1.12.

ECONOMIST: The genetics of happiness

Guests can sample signature tasting plates from the Adour kitchen or try my special black truffle croque-monsieur.

FORBES: Create Your Own Culinary Presidential Inauguration