He served his patients well and, without even knowing it, he was free from concern over life and death.

他真诚服务病人，又在不知不觉中堪破了生死。

youdao

His words "my life is over" rang in my ears for weeks after, and as Thanks-giving vacation neared, my concern for Richard heightened.

他的话“我的生命没有意义”几个星期之后还在我的耳边回响。随着感恩节假期的临近，我对理查德的关心更增加了。

youdao

Radioactive iodine in food is of immediate concern, but it has a relatively short half-life and will naturally decay over a short time frame.

食品中的放射性碘直接引起人们的关注，但是它的半衰期相对较短并将在短时间内自然衰变。

youdao

The Arab League, notably silent about Syria, was suddenly emboldened to announce its own concern over the loss of civilian life.

ECONOMIST: Syria and the region

But other times, I realize that my concern over spending has held us back from living in the moment or enjoying life experiences that we could probably afford.

WSJ: The Price of Being Too Thrifty