Students spend their time worrying about their grades.

学生花时间担心他们的成绩。

I also keep worrying about getting better grades than my classmates.

我也一直担心成绩比同学好。

During the operation, she sat in the waiting room for over an hour worrying about him.

手术期间，她在候诊室坐了一个多小时，担心着他。

This matter is not at all worth worrying about.

这件事根本不值得担心。

I had a sleepless night worrying about the exam.

我因为担心考试而度过了一个失眠的夜晚。

She experienced a sleepless night worrying about her exam results.

她因为担心考试结果而经历了一个不眠之夜。

These are just trivial matters in life, not worth worrying about.

这些都是生活中的琐事，不值得担心。

They live a well-to-do life, without worrying about food and clothing.

他们过着小康的生活，不愁吃穿。

He does things with nothing scared, never worrying about the consequences.

他做事百无禁忌，从不担心后果。

She has a bit of a nervous temperament, always worrying about small things.

她有点神经质，总是担心一些小事。