「react」指對某事物或刺激做出回應或產生化學變化。
回應
EN: to respond to something
翻譯: 對某事做出回應或反應
化學反應
EN: to undergo a chemical change
翻譯: 發生化學變化
反對
EN: to act in opposition
翻譯: 採取反對行動
產生作用
EN: to have an effect on something
翻譯: 對某事物產生作用或影響
小提醒：注意「react」後接的介系詞：對事件用「react to」，對人用「react against」，在化學中用「react with」。
點擊下方的 US / UK 按鈕可播放發音。
Real-life Examples of "React" from YouTube Videos
Desining from Day One: Artists as Founders: Multiverse (S20) - YC Gaming Tech Talks 2020
Y Combinator
“right, and you need to make these, like really important foundational decisions. uh, without necessarily knowing you know how people will react.”
1. to behave or change in a particular way when something happens or when someone does something
（對某情況或事件）作出反應，回應
How did she react when you told her the news?
當你告訴她這個消息時，她有什麼反應？
The market reacted positively to the company's announcement.
市場對公司的公告作出了積極的反應。
2. to become ill or have an allergic response after eating, touching, or breathing something
（對食物、藥物、物質等）產生不良反應，過敏
Some people react badly to penicillin.
有些人對盤尼西林會產生嚴重的不良反應。
My skin reacts to certain chemicals in laundry detergent.
我的皮膚對洗衣精裡的某些化學物質會過敏。
3. to act in opposition or resistance to something
反抗，反對
The public reacted against the government's new policy.
公眾對政府的新政策表示反對。
He reacted strongly to the unfair criticism.
他對這不公平的批評作出了強烈的反抗。
4. (in chemistry) to undergo a chemical change when mixed with another substance
（化學）起化學反應
Iron reacts with oxygen to form rust.
鐵與氧氣發生化學反應會形成鐵鏽。
The two chemicals reacted violently when combined.
這兩種化學物質混合時發生了劇烈的化學反應。
| Pattern | Meaning | Example |
|---|---|---|
| react + to + noun | 對…做出反應 | How did he react to the news? (他對這消息有何反應？) |
| react + with + noun | 與…產生化學反應 | Sodium reacts violently with water. (鈉會與水產生劇烈反應。) |
| react + against + noun | 反抗…；反對… | The younger generation often reacts against tradition. (年輕一代常常反抗傳統。) |
| react + by + V-ing | 透過…方式反應 | She reacted by slamming the door. (她的反應是用力甩上門。) |
| react + adverb | 以…方式反應 | The market reacted positively to the announcement. (市場對這項公告反應積極。) |
would react to + V 的假設語氣中。EN:How would she react to hear such news?
翻譯:如果聽到這樣的消息，她會作何反應？
EN:The market reacted badly to the company's announcing layoffs.
翻譯:市場對該公司宣布裁員反應不佳。
EN:The government would react swiftly to prevent a crisis.
翻譯:政府會迅速反應，以防止危機發生。
描述對具體事實或事件的反應時，使用 react to + noun/gerund；在假設或談論對潛在行動的反應時，才考慮使用 react to + infinitive 結構。
react vs respond
「react」強調對刺激的本能或即時反應，常帶有情緒色彩；「respond」則更側重經過思考、有意識的回應或答覆。
react vs act
「react」是被動地對外部刺激做出反應；「act」是主動採取行動，可能出於自身意願或計劃。
react vs behave
「react」指對特定刺激的單一反應；「behave」指在特定情境下整體的舉止、行為表現或是否符合規範。
在口語中，常用來引述或轉述他人對某事的反應或評價。 EN: So I told her the news, and she just reacted with a blank stare. 翻譯: 所以我告訴她這個消息，她只是面無表情地看著我。
EN:How did your parents react when you said you were moving abroad?
翻譯:你說你要搬到國外時，你父母有什麼反應？
常與副詞連用，強調反應的強烈程度或即時性，使描述更生動。 EN: He reacted so badly when he saw the mess in the kitchen. 翻譯: 他看到廚房一團亂時，反應超差的。
EN:Don't react too quickly before you hear the whole story.
翻譯:在你聽完整個故事之前，別反應太快。
在思考或組織語句時，可用 "the way I reacted" 或 "how people react" 作為填充短語，緩衝對話節奏。 EN: The whole situation was just... the way I reacted, I'm not proud of it. 翻譯: 整個情況就是...我當時的反應，我自己也覺得不太好。
EN:It's interesting, you know, how people react under pressure.
翻譯:這很有趣，你知道的，就是人們在壓力下的反應。
正式書寫注意：在正式或學術寫作中（如報告、論文），建議使用更精確的詞彙，如 "respond"、"behave" 或 "exhibit a response"，以替代較口語化的 "react"，使語調更為客觀嚴謹。
react to
react to [noun/pronoun]
對...做出反應
react against
react against [noun/pronoun]
反抗，抵制
react with
react with [noun]
與...發生化學反應
react strongly
react strongly
反應強烈
react positively/negatively
react positively/negatively
做出正面/負面反應
react accordingly
react accordingly
據此做出反應，採取相應行動
react instinctively
react instinctively
本能地反應
×I reacted the news.
✓I reacted to the news.
「react」是不及物動詞，後面接事物時需搭配介系詞「to」。
×He reacted angrily.
✓He reacted angrily. / He had an angry reaction.
「react angrily」文法正確，但口語中較少直接將副詞置於動詞後描述情緒。更自然的說法是使用名詞形式「had a ... reaction」或更具體的動詞（如「got angry」）。此處列出常見學習者對副詞位置的不確定性及更地道的替代說法。
×This chemical reacts water.
✓This chemical reacts with water.
描述兩種物質產生化學反應時，需使用「react with」。
×I will react you soon.
✓I will get back to you soon. / I will respond to you soon.
「react」主要指對某事件或刺激的「本能或情緒反應」，不用於表示「回覆訊息或信件」。應用「respond」或「get back to」。
×We must react this situation immediately.
✓We must react to this situation immediately.
與錯誤1類似，但強調「react」後接「situation」、「event」、「change」等抽象名詞時，同樣需要介系詞「to」。