i suppose it should be 爱情 稍纵即逝。 because Chinese don't use the verb "to be" between a noun and an adjective

Hey! ;) Have you ever listened to the song named "Let her go"? A sentence of its lys may be albe to express this meaning clearly and easily: "Love comes slow and goes so fast" ;)　I hope that it helps and by the way,LIsten to this song,please!!!!!! It really sounds great ;D

有些夫妻. 或是情侶. 雖然並無分開(仍然在一起). 但是其愛情已經消退或者變質. 愛情的確稍縱即逝(稍微. 不留意. 則. 消逝). 我以為這是至理名言 我也以為. 常常. 不那麼愛的人比較容易相處 因為對於真正所愛往往寧為玉碎. 不為瓦全

爱情稍微一放松就会消失 It means when you are in love ,you should be careful!

Love is so transient . It's already gone before you get a chance to say goodbye