What was the defining factor in, you know, getting Trump elected or growing the alt-right.

什么是决定性因素，让特朗普当选，或者助长了另类右派。

Research at the Duke Center for Human Genome Variation, sought to define the factors that contribute to contagious yawning.

杜克人类基因组变异中心的研究试图确定导致传染性打哈欠的因素。