So you could use sort of negative selection in order to find the ones that you want.

这样你就可以用某种负向选择,去找到你想要的细菌

耶鲁公开课 - 生物医学工程探索课程节选

It could be that in thinking about the nature of the combination we're led to see that in certain ways the combination-- the interaction effects--are negative, are bad ones.

可能在考虑这种组合的本质时,我们看到了再某些方面这种组合-,相互影响，是负面的，是不好的。

耶鲁公开课 - 死亡课程节选

There's the weird diets but hard to classify: Detox Diet, The Rave Diet, so if you're into raves you can go do that, and The Negative Calorie Diet, so these -the Negative Calorie Diet are ones that- where you eat food that have negative calories, so you consume it but it burns off more calories than it actually has.

这些是难以归类的减肥法,排毒法,锐舞减肥法,如果你对锐舞感兴趣,就可以照着做,还有负热量减肥法,负热量减肥法是指,吃具有负热量效应的食物,当你吃它的时候,消耗掉的热量比食物本身所含热量还多

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选