Harry's brain seemed to be sagging under the weight of what he was hearing.

哈利听到这许多东西之后，他的大脑似乎不胜负担了。

(groaning) - What made you think I was a Sag?

（呻吟） - 是什么让你认为我是下垂的？

The more tension in the cable, the tauter it becomes, and so the less it sags.

电缆的张力越大，它就会变得越紧，因此它的下垂就越少。

So she decided to go limp and let her whole weight sag against the hand that was holding her head.

所以她决定瘫软下来， 让她的整个体重都靠在扶着她头的手上。

The word " sag" (sag) has several different meanings in English; take a look at that Learning Guide for some additional explanations.

“下垂” （sag）这个词在英语中有几种不同的含义；查看该学习指南以获取一些其他解释。