Definition
to idly dwell on someone or something you adore, often in a futile and impractical manner
徒然地思念
She often moons over her old flame, even though she knows he no longer loves her.
她经常徒然地思念她的旧情人，即使她知道他不再爱她。
He always moons over those perfect vacations but never plans the next trip.
他总是徒然地思念那些完美的假期，但从未计划下一次旅行。
After summer ended, he often mooned over that beach but did nothing to arrange a return.
夏天结束后，他经常徒然地思念那个海滩，但没有安排重返的计划。