For only a very short time — the adverb of 'fleeting'.

For only a very short time指只有非常短的時間 the adverb of 'fleeting'是'fleeting'的副詞

You use it about actions that happened and were over almost at once: he smiled fleetingly, she glanced fleetingly at the door, the thought crossed her mind fleetingly. Like 'fleeting', it carries the sense that the moment was too short, that it slipped past.

You use it about actions that happened and were over almost at once你用它來說那些發生後幾乎立刻結束的動作 he smiled fleetingly他一閃即逝地笑了笑 she glanced fleetingly at the door她短短瞥了一眼門口 the thought crossed her mind fleetingly這個念頭在她腦中一閃而過 Like 'fleeting'跟'fleeting'一樣 it carries the sense that the moment was too short它帶有「那一刻太短暫」的意味 that it slipped past一下子就過去了

It very often appears with verbs of seeing, thinking and feeling — glance, wonder, smile, appear, consider — because those are the actions that come and go in an instant.

It very often appears with verbs of seeing, thinking and feeling它很常跟表示看、想、感覺的動詞一起出現 glance, wonder, smile, appear, consider像glance、wonder、smile、appear、consider這些字 because those are the actions that come and go in an instant因為這些動作都是一瞬間就發生又消失的

It is a written, somewhat literary word; in conversation people say 'for a second', 'just for a moment' or 'quickly'. Position is flexible: 'he fleetingly wondered' and 'he wondered fleetingly' are both fine, though the second sounds more natural.

It is a written, somewhat literary word這是個偏書面、有點文學味的字 in conversation people say 'for a second', 'just for a moment' or 'quickly'口語裡大家會說'for a second'、'just for a moment'或'quickly' Position is flexible位置很彈性 'he fleetingly wondered' and 'he wondered fleetingly' are both fine'he fleetingly wondered'和'he wondered fleetingly'都可以 though the second sounds more natural不過第二種聽起來比較自然