1、[下降]descend; go or come down; drop; fall;

2、飞行员被告知要下降到2-2000英尺。The pilots were told to descend to two-two thousand feet.

3、所以我可以下降至海底很深的地方。So I can descend to considerable depths.

4、近年来致命交通事故发生率已经下降。Fatal road accidents have decreased in frequency over recent years.