If something happens noticeably, you can see it or feel it without trying hard — the change is easy to notice.

If something happens如果某件事發生得 noticeably很明顯, you can see it or feel it without trying hard你不用費力就能看到或感覺到 — the change is easy to notice這個改變很容易被注意到。

It is the how-word from noticeable: she is noticeably taller; the room is noticeably quieter; he has improved noticeably. People use it a lot with words like better, worse, bigger, and with verbs like change, improve, increase.

It is the how-word from noticeable它是noticeable的副詞形式: she is noticeably taller她明顯變高了; the room is noticeably quieter房間明顯安靜多了; he has improved noticeably他進步得很明顯。 People use it a lot with words like better, worse, bigger大家常常把它跟better、worse、bigger這類字放在一起用, and with verbs like change, improve, increase也常跟change、improve、increase這類動詞一起用。

It is ordinary English, a little more careful than you can tell, and you will hear it from teachers, doctors, and newsreaders.

It is ordinary English這是很普通的英文, a little more careful than you can tell比you can tell稍微正式、講究一點, and you will hear it from teachers, doctors, and newsreaders你會從老師、醫生和新聞主播口中聽到它。

Though actually, it does not have to mean a huge change. A noticeably different haircut can still be a small one; the point is that other people can spot it. If nobody would see the difference, you would not say noticeably.

Though actually不過其實, it does not have to mean a huge change它不一定是指很大的改變。 A noticeably different haircut明顯不一樣的髮型 can still be a small one還是可以是很小的改變; the point is that other people can spot it重點是其他人看得出來。 If nobody would see the difference如果沒有人看得出差別, you would not say noticeably就不會用noticeably這個字。

It is not a word for famous or special — only for “you can tell”.

It is not a word for famous or special它不是用來說「有名」或「特別」的字 — only for 'you can tell'只是用來說「看得出來」。