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.
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.
有许多这样偶然的种类组合。
定制家具被视为偶然发现的东西，按标志集合点的方式组合。
Bespoke furniture viewed as found objects composed in the way to mark a gathering point.
风荷载是可变荷载、水平荷载，不能笼统地视为偏心荷载，应参与基本荷载组合计算，并参与偶然荷载组合验算。
Wind load is a kind of variable, horizontal load and it shall not be generally defined as an eccentric load.
组合数学，复杂性和偶然性：献给多米尼克·威尔士。
Combinatorics, Complexity, and Chance: a Tribute to Dominic Welsh.
组合数学，复杂性和偶然性：献给多米尼克·威尔士。
Combinatorics, Complexity, and Chance: a Tribute to Dominic Welsh.
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