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单词 population scientist
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双语版 TED-Ed 演讲精选

And though the proportions of different blood types vary between human populations, scientists aren't sure why they evolved; perhaps as protection against blood born diseases, or due to random genetic drift.

虽然不同血型的比例在人群中大不相同,科学家也不能确定为什么它们会这样发展;也许是为了防止血液传播疾病,或者只是任意的基因漂流。

科学60秒-科学美国人 2020年3月合集

From Australia: To help boost Sydney Harbor's endangered seahorse population, scientists bred baby seahorses in an aquarium and built crab-trap-like undersea " hotels" to protect them as they adapt to the wild.

来自澳大利亚:为了帮助增加悉尼港濒临灭绝的海马种群,科学家们在水族馆中培育了小海马, 并建造了类似捕蟹器的海底“旅馆” 来保护它们适应野外环境。

TED-Ed(视频版)

At the time, Australia was overrun by the European rabbit— an invasive species— so, in an attempt to control the population, scientists released a virus called myxoma, which had been previously shown to be almost 100% lethal to European rabbits.

当时,澳大利亚被入侵物种欧洲兔占领, 因此,为了控制种群数量,科学家释放了一种名为粘液瘤的病毒, 此前已证明该病毒对欧洲兔几乎 100% 致死。

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