1.
The carefree childhood became a thing of the past.

无忧无虑的童年已经是过去时了。
2.
He spent his blissfully carefree childhood in the countryside.

他在乡下度过了他无忧无虑的幸福童年。
3.
the carefree joys of childhood; carefree millionaires, untroubled financially.

孩童时期无忧无虑的快乐;无忧无虑的百万富翁,没有财政上的烦恼。
4.
He hoped for a secure old age.

他希望有一个无忧无虑的晚年。
5.
He is always very much contented; he is a careless youth.

他总是很满足,是个无忧无虑的青年。
6.
Carefree and lighthearted.

无忧无虑的,轻松的
7.
Freedom from worry or trouble.

无忧虑无烦恼或忧虑
8.
Those people are certainly happy-go-lucky.

那些人的确是无忧无虑。
9.
feel secure about one's future

对自己的前途无忧无虑
10.
Few people are free from care.

很少人是无忧无虑的.
11.
They're all happy-go-lucky fellows.

他们都是无忧无虑的人。
12.
He leads a life (which is) free from care.

他过着无忧无虑的生活。
13.
a comfortable life, job

无忧无虑的生活、 工作.
14.
I felt like going back to my worry-free childhood when I was innocent and natural and my very ambitious youth which was full of ideals.
我仿佛回到了无忧无虑、天真烂漫的童年时光, 以及那雄心勃勃、充满理想的青年时代,
15.
Not being burdened by trouble, worry, or care; happy and carefree.

无忧无虑的不为烦恼、忧虑或担心所困扰的;快乐的和无忧虑的
16.
He has an empty purse, but a free heart.

他身无分文,但无忧无虑。
17.
Better poverty without care, than richness with.

无忧无虑的贫穷生活胜过于富裕却忧愁的生活。
18.
Free of worries and responsibilities.

无忧无虑的或不负责任的.