吃透英语课本,提升在校竞争力
adj. 无忧无虑的;轻松愉快的
He thought back to the carefree days of his childhood.
他回想起自己无忧无虑的童年时代。
She lived a carefree life.
她过着无忧无虑的生活。
adj.无忧无虑的;不负责的
worry-free
light-hearted