Sometimes subtle changes in the structure of a protein can convert it from an active state into an inactive state.

有时蛋白质结构上一些很小的变化,就能将其由激活态转变为非激活态

耶鲁公开课 - 生物医学工程探索课程节选

Then the Phase Three that I mentioned, the 10,000 years ago had several things occur that were very important in shaping our current situation.

最后是我提过的第三阶段,一万年前发生的某些转变,对塑造当下的饮食结构而言,意义重大

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选