The problem with--there's a problem with gambling behavior because in a certain fraction of the population we have pathological gambling.

赌博行为有个特殊情况,在人群中总会有一小撮人,我们称之为病态赌博

耶鲁公开课 - 金融市场课程节选

So you made somehow an anti-sense polynucleotide to the insulin gene or some fraction of the insulin gene.

这样你就合成了,胰岛素基因的反义多聚核苷酸链,或者说胰岛素基因的片段

耶鲁公开课 - 生物医学工程探索课程节选

The idea really took root--the idea, the intuitive idea is that as you write a large number of policies, the fraction that will result in accidents becomes closer and closer to the probability of one accident.

这种观点建立在...,观点是,只要你签的保单足够多,事故占保单总数的比例就会越来越接近,事故发生的概率

耶鲁公开课 - 金融市场课程节选

Those receptors, some fraction of them, are specific for the ligand that the pre-synaptic cell releases.

这些受体 其中一部分,特异性地结合突触前细胞释放的配体

耶鲁公开课 - 生物医学工程探索课程节选