"两情若是久长时,又岂在朝朝暮暮."怎样翻译才完美?

1.If love between both sides can last for age,why need they stay together night and day?
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全诗：
纤云弄巧，飞星传恨，银汉迢迢暗渡。金风玉露一相逢，便胜却人间无数。柔情似水，佳期如梦，忍顾鹊桥归路。 两情若是久长时，又岂在朝朝暮暮。
译作：Clouds float like works of art;Stars shoot with grief at heart.Across the Milky Way the Cowherd meets the Maid,When autumn’s Golden Wind embraces Dew of Jade,All the love scenes on earth, however many, fade.Their tender love flows like a stream;This happy date seems but a dream.Can they bear a separate homeward way?If love between both sides can last for age,Why need they stay together night and day?
2.另一版本
Eternal love between us two,
Shall withstand the time apart.
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全诗
Fairy Of The Magpie Bridge
by Qin Guan

Among the beautiful clouds,
Over the heavenly river,
Crosses the weaving maiden.

A night of rendezvous,
Across the autumn sky.

Surpasses joy on earth.
Moments of tender l