fleetingly

The quarks and gluons indeed break out of confinement and behave collectively, if only fleetingly.

夸克与胶子确实打破牢笼而表现出集体行为, 虽然这种状态转瞬即逝.

I think I saw her, fleetingly, at a football match.

我想我在一场足球赛上匆匆见过她一次。

A smile passed fleetingly across his face.

他脸上闪过一丝笑容。