转瞬即逝的用英语怎么说？

转瞬即逝的

例句

• There is a sense of transience about her. 她给人一种转瞬即逝的感觉。
• There is a sense of transience about her, a feeling that she has only stopped off here en route to another place. 她给人一种转瞬即逝的感觉，仿佛她只是在前往他处的途中在此略作停留。