If you comment on a situation, or make a comment about it, you give your opinion on it. Mr Cook has not commented on these reports... I was wondering whether you had any comments. If you mention something, you say it, but only briefly, especially when you have not talked about it before. He mentioned that he might go to New York. If you remark on something, or make a remark about it, you say what you think or what you have noticed, often in a casual way. Visitors remark on how well the children look... General Sutton's remarks about the conflict.

comment 表示发表评论或意见。例如：Mr Cook has not commented on these reports (库克先生并未就这些报道发表评论)，I was wondering whether you had any comments (请问您对此有何见解)。mention 表示简要地说起某事，尤其是以前没有说过的内容。例如：He mentioned that he might go to New York (他提到过可能会去纽约)。remark 通常指随意地说出自己的想法或注意到的事情。例如，Visitors remark on how well the children look (前来探望的人说孩子们看上去很健康)，General Sutton's remarks about the conflict (萨顿将军对这场冲突的看法)。