descent

We weren't prepared for the descent of thousands of journalists on the town.

我们没想到数千名记者会突然来到镇上。

The plane began (to make) its final descent into the airport.

飞机开始（做）最终下降，准备在机场着陆。

His descent into crime was rapid.

他很快就堕落到犯罪的地步。