Twitchy describes someone who is nervous in a way you can see in their body — they cannot sit still, their eyes keep moving to the door, their fingers tap. It is not deep fear and not a calm worry; it is jumpy, restless, on edge, as if something is about to happen. You feel twitchy before a test, or when you are waiting for news, or when you are in a place that does not feel safe.

Twitchy describes someone who is nervous in a way you can see in their bodytwitchy用來形容一個人緊張到從身體動作就看得出來 — they cannot sit still坐不住, their eyes keep moving to the door眼睛一直往門口瞄, their fingers tap手指不停敲。It is not deep fear and not a calm worry這不是深層的恐懼，也不是平靜的擔心; it is jumpy, restless, on edge而是那種一驚一乍、坐立不安、緊繃的感覺, as if something is about to happen好像有什麼事要發生了。You feel twitchy你可能感覺到twitchy before a test在考試前, or when you are waiting for news或等消息的時候, or when you are in a place that does not feel safe或是在一個讓你覺得不安全的地方。

It is informal and a bit physical, which is why it sounds more alive than 'nervous'. It also gets used for groups and even for markets and governments: 'investors are twitchy', 'the police were twitchy that night' — meaning ready to react fast, maybe too fast.

It is informal and a bit physical這是一個口語、帶點身體感的字, which is why it sounds more alive than 'nervous'所以聽起來比'nervous'更生動。It also gets used for groups and even for markets and governments它也可以用在一群人身上，甚至用在市場和政府身上: 'investors are twitchy', 'the police were twitchy that night'像'investors are twitchy'（投資人很緊繃）、'the police were twitchy that night'（那晚警方神經很緊繃） — meaning ready to react fast, maybe too fast意思是隨時準備快速反應，甚至反應過度。

And it can describe a thing that moves in small sudden jerks: a twitchy muscle, a twitchy steering wheel that responds to the smallest touch. That last use is not about feelings at all.

And it can describe a thing that moves in small sudden jerks它也可以形容一個會突然小幅抽動的東西: a twitchy muscle像twitchy muscle（會抽動的肌肉）, a twitchy steering wheel that responds to the smallest touchtwitchy steering wheel（一碰就有反應的方向盤）。That last use最後這個用法 is not about feelings at all完全跟情緒無關。