Many people thought his first hit song was just a flash in the pan, but he went on to have a successful career.

許多人認為他的第一首熱門歌曲只是曇花一現，但他後來卻擁有成功的職業生涯。

We need consistent performance, not just a flash in the pan.

我們需要持續的表現，而不僅僅是曇花一現。