Impulsiveness is the name for acting on a sudden feeling before you stop to think about danger or trouble. It is a noun: not the one act itself, but that way of acting, or that side of a person.

Impulsivenessimpulsiveness is the name for指的是 acting on a sudden feeling順著一時衝動去做的行為，before you stop to think about danger or trouble還沒停下來想到危險或麻煩就這樣。It is a noun它是名詞：not the one act itself講的不是那一次行為本身，but that way of acting而是那種做事的方式，or that side of a person或一個人的那一面。

A child who grabs the last cake, a shopper who buys a coat they did not plan, a driver who changes lanes with no look — people point to impulsiveness in all of these.

A child who grabs the last cake搶走最後一塊蛋糕的小孩、a shopper who buys a coat they did not plan買了根本沒打算買的外套的顧客、a driver who changes lanes with no look沒看就變換車道的司機——people point to impulsiveness in all of these大家都會說這些是impulsiveness。

Parents and teachers use it in ordinary talk; doctors who study the mind use it in a more careful way, as a pattern that can last.

Parents and teachers父母和老師 use it in ordinary talk在日常對話裡會用這個詞；doctors who study the mind研究心智的醫生 use it in a more careful way用起來則更謹慎，as a pattern that can last把它當成一種可能持續存在的模式。

Though actually, it is not the same as being brave, and it is not the same as being quick. A brave person may still think first. A quick person may already know the answer. With impulsiveness, the thinking comes late, or not at all.

Though actually不過實際上，it is not the same as being brave它跟勇敢不一樣，and it is not the same as being quick也跟反應快不一樣。A brave person勇敢的人 may still think first可能還是會先想過。A quick person反應快的人 may already know the answer可能早就知道答案。With impulsiveness而impulsiveness則是，the thinking comes late思考來得很晚，or not at all或者根本不會來。

People also stretch it for small happy things, like an unplanned snack. The core stays the same: a push from inside, and no pause.

People also stretch it大家也會把這個詞延伸使用 for small happy things用在小小的開心事上，like an unplanned snack像是臨時想吃的零食。The core stays the same核心不變：a push from inside一股從內心冒出來的衝動，and no pause中間沒有停頓。