If you make a remark about something, you say something about it.
议论; 评论 She has made outspoken remarks about the legalization of marijuana. 她直言不讳地评论过大麻合法化问题。
I remarked that I would go shopping that afternoon.
我说过那天下午我要去买东西。
notice 和 observe 都可以表示“注意到,察觉到”,但有一定区别。notice 指无意中“察觉到”;observe 则可以指有意观察、仔细地看,比 notice 更正式: