汤姆咕哝了几句表示同意的话，但他觉得自己的处境很危险。

Tom mumbled something that stood for assent, but felt that he was getting upon dangerous ground.

youdao

Cool / 酷的意思是good / 好或者great / 好极了，这是表示同意的常用词。

Cool / Cool simply means good / good or great / great and is a common word of approval.

youdao

两位主帅都表示同意的一件事便是现在切尔西在争冠道路上拥有最佳机会，虽然安切洛蒂表示担忧地说道：“一切都没有定数。”

One thing both manager were agreed on was that Chelsea are now in the best position to win the title, though Ancelotti was at pains to say: “Nothing has been decided.”

youdao

But still, it must be with his own consent, I.E. The consent of the majority, " giving it either by themselves, or through their representatives."

但是这仍须得到他自己的同意，即得到大多数的同意，由他们自己或选出的代表所表示的大多数同意“

耶鲁公开课 - 公正课程节选

I agree involves saying "Yes" to something. It's when two people think alike.

agree 表示同意某事。一般用在两个人想法一致的时候。

I agree课堂 - SpeakingMax英语口语达人