Definition (行為)
Acting suddenly without planning; driven by a sudden urge.
一時衝動
He bought a ticket to Paris on impulse.
他一時衝動買了一張去巴黎的票。
She signed up for the pottery class on impulse.
她一時衝動報名了陶藝課。
I usually wouldn’t buy something this expensive, but I bought it on impulse today.
我通常不會買這麼貴的東西，但今天一時衝動就買了。