几个易感基因偶然组合可能导致一些流感症状很快恢复，而另一些人则要忍受数周的煎熬。

An unlucky combination of "vulnerable" genes could explain why some people recover from the flu overnight and others struggle to shake off the virus for weeks.

youdao

在多年前一次冬令营期间，对哈佛大学法洛参考图书馆和隐花植物标本室的参观中，我偶然发现这个稀奇古怪的生物学+童话的组合。

I stumbled upon this curious blend of biology and fable during a wintry campus visit to Harvard's Farlow Reference Library and Herbarium a few years ago.

youdao

有许多这样偶然的种类组合。

There are many such casual associations of species.

youdao