He was a happy cat without a care in the world.

他是只快乐的猫，远离着身边嘈杂世界的烦扰。

In September of 2015, I walked through the university campus without a care in the world.

2015年9月，我漫步在大学校园里，无忧无虑。

Is this what our justice system has come to...guys like you walking the streets without a care in the world?

我们的司法体系已经成了这副样子了吗，让你这样的人大摇大摆地走在大街上而毫无顾忌？

He was happy then, and without a care in the world.

那时他很快乐，世事无忧。

This was her, a motorbike monster without a care in the world.

这就是她，一个无忧无虑的摩托车怪物。

He crossed the room slowly, lightfooted, without a care in the world.

他慢慢地穿过房间， 脚步轻盈，满不在乎。

They're only interested in their own life, without a care in the world about the people around them.

他们只关心自己的生活，不关心周围的人。