系統被推離原本的路
畫面的字面版本，用在科學和技術寫作裡。
noun · C2
A small change in how something moves, behaves, or in what it is like — usually a push away from a steady, expected pattern, and usually caused by something outside the thing itself.
擾動；微小的變動
核心畫面
Something is already running along a steady path — a planet round its star, a season that comes the same way every year, a person going calmly through a morning. Then something small touches it from the side. The path does not break; it bends. You only notice because you knew what the path was supposed to look like. That is what this word points at: the bend, not the break, and the outside push that caused it.
可以想成有個東西本來沿著固定的路在走。繞著恆星跑的行星、每年都差不多的季節、一個平靜過著早晨的人。然後旁邊有什麼輕輕…更多收起
可以想成有個東西本來沿著固定的路在走。繞著恆星跑的行星、每年都差不多的季節、一個平靜過著早晨的人。然後旁邊有什麼輕輕碰了它一下。路沒有斷，只是歪了一點。你看得出來，是因為你本來就知道那條路長什麼樣。這個字指的就是那個「歪掉的一點」，不是斷掉，而且推它的力量來自外面。From the word’s history
The supplied source traces the word through Middle French perturbation and Old French perturbacion back to Latin perturbatio. It is the noun that belongs with the verb perturb, so the word names the being-stirred itself rather than the thing that does the stirring.
資料裡的來源是中古法文 perturbation、古法文 perturbacion，再往上是拉丁文 perturbatio。它是動詞 perturb 的名詞，所以這個字指的是「被攪動」這件事本身，不是攪動它的那個東西。
Wiktionary etymology supplied in evidence packet (kaikki:3f6f69a190036ae4:544524932): Middle French perturbation < Old French perturbacion < Latin perturbatio.
Two branches
心被推離平靜
同一個推力，這次被推的是人。平靜是那條原本的路，擔心的事就是旁邊那一下。
noun · C2
Worry and unease about something that has happened or may happen; the state of being stirred up in your mind rather than calm.
不安；心緒被攪動