关于agree about的意思

agree about sth. （双方/各方）对某问题有一致看法
和 be in agreement with/on sth. 有相同意思.
相比
agree with （对一个人/一个观点）同意或认同
agree to (sth./ do sth.) 愿意/同意
例句：
John and I agree about the harmful effects of smoking.
John and I are in agreement on the harmful effects of smoking.
John and I agree with the statement that smoking is harmful.
John has agreed not to ever smoke again.

这是同意某物，某事，
agree with somebody是同意某人的看法

对某事，某物有相同的看法
对某事达成一至意见

对…有相同的看法；就…取得一致意见
短语
agree about对…有相同的看法
agree on / about和某人达成共识
agree on /about达成协议

同意