It's providing a means of deciding where the gum has decayed.

提供了决定牙周炎在哪恶化的手段。

耶鲁公开课 - 死亡课程节选

Think about how the world has decayed, since those days.

想想世界是怎样堕落的,从人们开始喝酒起

耶鲁公开课 - 古希腊历史简介课程节选

My house is a decayed house.

我的房子是一幢倾圮的房屋。

耶鲁公开课 - 1945年后的美国小说课程节选