These are all words for sth that you say or write, especially sth that gives information or an opinion.以上各词均指口头或书面的说明、宣布。
statement something that you say or write that gives information or an opinion, often in a formal way通常指正式的说明、声明、陈述、报告：◆A government spokesperson made a statement to the press.政府发言人向新闻界发表了一份声明。
comment something that you say or write that gives an opinion on sth or is a response to a question about a particular situation指议论、评论、意见：◆She made helpful comments on my work.她对我的工作提出了有益的意见。
announcement a spoken or written statement that informs people about sth指公告、布告、通告：◆the announcement of a peace agreement和平协议公告
remark something that you say or write that gives an opinion or thought about sb/sth指谈论、言论、评述：◆He made a number of rude remarks about the food.他对这食物作了许多无礼的评论。
declaration(ratherformal) an official or formal statement, especially one that states an intention, a belief or a feeling, or that gives information指官方或正式的公告、宣告、宣言、声明：◆the declaration of war宣战
observation(ratherformal) a comment, especially one based on sth you have seen, heard or read尤指根据所见、所闻、所读而作的评论：◆He began by making a few general observations about the report.开头他先对这个报告作了几点概括性的评论。
comment, remark or observation?用 comment、remark 还是 observation？
A comment can be official or private. A remark can be made in public or private but is always unofficial and the speaker may not have considered it carefully. An observation is unofficial but is usually more considered than a remark. * comment 既可是官方的也可是私下的；remark 既可是公开的也可是私下的，但总是非官方的，说话者可能未经深思熟虑；observation 是非官方的，但通常较 remark 多几分考虑。
Patterns
a(n) statement/comment/announcement/remark/declaration/observation about sth
to make a(n) statement/comment/announcement/remark/declaration/observation
to issue a(n) statement/announcement/declaration
[U](old-fashioned or formal) thequalityofbeingimportantorinterestingenoughtobenoticed引人注目；显耀SYNnote◆Theexhibitioncontainsnothingthatisworthyofremark. 这次展览没有任何值得看的东西。
🔑re·markBrE/rɪˈmɑːk/NAmE/rɪˈmɑːrk/verbpresent simple - I / you / we / theyremarkBrE/rɪˈmɑːk/NAmE/rɪˈmɑːrk/present simple - he / she / itremarksBrE/rɪˈmɑːks/NAmE/rɪˈmɑːrks/past simpleremarkedBrE/rɪˈmɑːkt/NAmE/rɪˈmɑːrkt/past participleremarkedBrE/rɪˈmɑːkt/NAmE/rɪˈmɑːrkt/ -ing formremarkingBrE/rɪˈmɑːkɪŋ/NAmE/rɪˈmɑːrkɪŋ/[I, T]tosayorwriteacommentaboutsth/sb说起；谈论；评论SYNcomment◆~on/uponsth/sbThejudgesremarkedonthehighstandardofentriesforthecompetition. 众评委说参赛作品水准很高。◆~how…SheremarkedhowtiredIwaslooking. 她说我看上去显得特别累。◆+ speech'It'smuchcolderthanyesterday,'heremarkedcasually. “今天比昨天冷多了。” 他漫不经心地说。◆~that…Criticsremarkedthattheplaywasnotoriginal. 评论家们指出这部戏剧缺乏创意。◆beremarkedonThesimilaritiesbetweenthetwohaveoftenbeenremarkedon. 人们经常谈到两者的相似之处。commentnote ⬥ remark ⬥ observe
These words all mean to say or write a fact or opinion.以上各词均指口头或书面说明事实或发表意见。
commentto express an opinion or give facts about sth指发表意见或说明事实：◆He refused to comment until after the trial.他拒绝在审判前作任何评论。
note(ratherformal) to mention sth because it is important or interesting指特别提到或指出：◆He noted in passing that the company's record on safety issues was not good.他顺便提到该公司在安全方面的记录不好。
remarkto say or write what you have noticed about a situation指说起、谈论、评论：◆Critics remarked that the play was not original.评论家指出这部戏剧缺乏创意。
observe(formal) to say or write what you have noticed about a situation指说起、谈论、评论：◆She observed that it was getting late.她说天色晚了。
comment, remark or observe?用 comment、remark 还是 observe？
If you comment on sth you say sth about it; if you remark on sth or observe sth, you say sth about it that you have noticed: there is often not much difference between the three. However, while you can refuse to comment (without on), you cannot 'refuse to remark' or 'refuse to observe' (without on). * comment on 表示谈论某事，remark on 或 observe 表示谈论或评论注意到的事物。以上三词通常无大的区别，但拒绝评论可说 refuse to comment（不带 on），不能说 refuse to remark 或 refuse to observe（不带 on）：◆He refused to remark/observe until after the trial.
Patterns
to comment/note/remark/observe that…
to comment on/note/remark/observe how…
to comment/remark on sth
to comment/remark/observe to sb
'It's long,' he commented/noted/remarked/observed.