This is the adverb of matter-of-fact. It tells you HOW someone said or did something: plainly, calmly, with no feeling shown, as if the thing were ordinary.

This is the adverb of matter-of-fact這是matter-of-fact的副詞形式。 It tells you HOW someone said or did something它是在說某人「怎麼」說或做某件事: plainly就是平淡地, calmly冷靜地, with no feeling shown不表現出任何情緒, as if the thing were ordinary好像那件事很平常一樣。

'He mentioned it matter-of-factly' means he did not raise his voice, did not pause, did not treat it as big news — he just said it.

'He mentioned it matter-of-factly'「他matter-of-factly地提了這件事」 means he did not raise his voice意思是他沒有提高音量, did not pause沒有停頓, did not treat it as big news也沒有把它當成什麼大新聞 — he just said it他就只是說了出來。

You will almost always see it next to a verb of speaking: said, told, announced, remarked, added, explained. That is where it lives.

You will almost always see it next to a verb of speaking你幾乎都會看到它出現在「說話」類動詞旁邊: said說, told告訴, announced宣布, remarked說道, added補充道, explained解釋道。 That is where it lives這就是它常出現的地方。

It is a written word more than a spoken one — you meet it constantly in novels and news reports, because a writer needs to tell you the tone of a line of speech, but in real conversation people are more likely to say 'he said it really calmly' or 'like it was nothing'.

It is a written word more than a spoken one它比較是個書面用字，不是口語用字 — you meet it constantly in novels and news reports你在小說和新聞報導裡常常看到它, because a writer needs to tell you the tone of a line of speech因為作者需要告訴你一句話的語氣, but in real conversation people are more likely to say 'he said it really calmly' or 'like it was nothing'但實際聊天時，大家比較會說「他講得很冷靜」或「好像沒事一樣」。

As with the adjective, the flat delivery does not always mean flat feelings. Writers often use it exactly when a character is upset: the calm voice is the point, and the reader feels the gap between what is said and what the person must be feeling. It can also carry a small edge of coldness, depending on what is being said.

As with the adjective就像形容詞一樣, the flat delivery does not always mean flat feelings平淡的語氣不代表心裡真的平靜。 Writers often use it exactly when a character is upset作家常常故意在角色心裡不平靜的時候用它: the calm voice is the point重點就在那個冷靜的聲音, and the reader feels the gap between what is said and what the person must be feeling讓讀者感覺到「說出來的話」跟「心裡真正的感受」之間的落差。 It can also carry a small edge of coldness它也可能帶一點點冷淡的味道, depending on what is being said要看說的是什麼事情。