Okay, so one possibility is that if somebody is underweight that creates its own set of heart consequences.

好的,有一种可能性是体重过轻,本身会导致一系列的心脏问题

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

A reaction performed by one enzyme creates a product that stimulates another enzyme that creates a product, and stimulates another enzyme, and through this cascade of reactions you amplify and carry the signal forward.

一种酶催化生成的产物会活化另一种酶,而它催化的产物又能激活其他酶,催化反应生成另一种产物,通过这层层反应,信号被放大,并不断向前传递

耶鲁公开课 - 生物医学工程探索课程节选