负责海关关衔的授予、晋级、降级、取消等工作。

To be responsible for the awarding, promotion, demotion and cancellation of the customs ranks.

时至今日，回想起来，仍然难过。

Even now the thought of it agonizes me.

得悉病重，甚感难过。

I am sorry to hear of your serious illness.

犯不着为此事难过。

There's no point getting upset about it.

在滇缅公路上行丰，人人都必须闯过四道“鬼门关”：瘴疟关、水泥泞关、路和险情关、机轰炸关。

Driving on the Yunnan-Burma Road, everybody must overcome the four dangers of miasmas and pernicious malaria, heavy rain and mud, dangerous road conditions and air raids by Japanese planes.