An investigation is underway to find out how the disaster happened.

调查已经展开，以查明灾难是如何发生的。

It was a cold evening, winter well underway.

那是个寒冷的夜晚，入冬已有多日。

The conference gets under way later today with a debate on the family.

会议将于今天晚些时候开始，首先会就家庭问题展开辩论。