1.distressing adj. 使人痛苦的，令人烦恼的

如：How distressing!
多令人难受啊！

A suffering animal is a distressing sight.
看到动物受痛苦，是一件很难受的事。

2.shed light on 照亮，阐明，把 ... 弄清楚

如：The woman has told them nothing that could shed light on her husband's whereabouts.
那个女人没有向他们提供，任何有关她丈夫下落的线索。

3.at one time 曾经，同时，一度

如：At one time, she is fine, but at another, she is abnormal.
有时候，她表现得很好，有时候又很失常。

He was at one time so devoted to piano playing.
他一度酷爱弹钢琴。