adj.心情愉快的；無(wú)憂無(wú)慮的

The children looks lighthearted after the final exam. 期終考試結(jié)束了，孩子們看上去都很輕松愉快。

He leans towards more lighthearted subjects in his later works. 他在后期的創(chuàng)作中傾向于比較輕松的主題。

She was annoyed at his lighthearted attitude. 他對(duì)她那種若無(wú)其事的態(tài)度感到很生氣。

Lighthearted youngsters were singing as they hiked through the woods. 無(wú)憂無(wú)慮的年輕人唱著歌步行穿過(guò)樹(shù)林。