This strategy is feasible when you have a small population.

这种策略在人口较少的情况下是可行的。

youdao

One of these is that they are believed to have a small population of stem cells which keep them going when other cells die or are killed off.

其中一个方面就是，人们认为肿瘤内也有一定数量的干细胞，这些干细胞使得肿瘤能够在其他细胞死亡或被消灭的情况下还能继续生长。

youdao

In many small Italian towns where local families have stayed put down the centuries, the entire population often shares just a few names.

住着生活了几世纪的本地居民的许多意大利小镇，整个人口通常共用着仅有的少数姓名。

youdao

"The polar bear does not have a small wild population, it does not have a restricted area of distribution and no marked decline has been observed, " Environment Canada says on its website.

CNN: World rejects new protections for polar bears

So to my mind I believe we have a responsibility to be a bit more careful talking about risks, to emphasize that the individual risks are small and the population risks are what we should be concerned about.

FORBES: How To Quell Radiation Fears? 'Test Everybody'

"I hope that these proposals are not going to be telling us that we're going to have a system that goes back to something that we used to have in the 1950s, which was suited to a very small part of the population, " he said.

BBC: GCSEs replaced by 'English Bac' in key subjects