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1·Night descends quickly in the tropics.

热带地区黑夜来得快。《牛津词典》

2·At this point the path descends steeply.

小路从这里陡然而下。《牛津词典》

3·Keep the drill centred in the borehole while it ascends and descends.

当钻头上下钻时，要把钻孔保持在中心。《柯林斯英汉双解大词典》

4·As evening descends on Dam Square so do the party-seekers.

当大坝广场的夜幕降临时，参加派对的人也来了。

5·Do bear in mind, though, that at this time of year the weather is very changeable and if the cloud suddenly descends, it's all too easy to wander off the track.

但是要记住，每年的这个时候天气变化无常，如果乌云突然降落，就很容易偏离轨道。

6·The curtain descends on the winter games.

冰上比赛落下帷幕。《新英汉大辞典》

7·A bird's-eye view of China would indicate that China's terrain descends in four steps from west to east.

从高空俯瞰中国大地，地势像四级阶梯，自西向东，逐级下降。

8·Outside, the drizzle descends.

外面已是蒙蒙细雨。

9·The mountain path descends to the lake.

山路下斜通向湖边。

10·The silence descends in volcanic chutes.

寂静是乘着火山状的降落伞降临的。

下降

1·This ratio also means that an unpowered hang-glider flying at a constant speed moves 15 metres forward for every one metre it descends.

这个比例也意味着一架无动力悬挂式滑翔机以恒定速率飞行时高度每下降1米，可以向前滑翔15米。

2·Regulate neurotic of after balance appear mess, the basic metabolism descends, the metabolism cans not develop smoothly, either.

调节神经的平衡出现紊乱后，基本代谢下降，新陈代谢也不能顺利开展。

3·At night a vast yellow barrier descends on the crossing, trapping latecomers inside.

夜晚，一个巨大的黄色屏障徐徐下降，将晚归者拦腰在外。

4·The temporary weight descends, may invite more serious rebound.

暂时的体重下降，可能会招致更严重的反弹。

5·A canyoneer descends by rope through one of Kanangra Main Canyon’s three 150-foot waterfalls.

在卡南格拉主峡谷中，一位溪降探险者正从一个三段式的、每段都有150英尺高的瀑布上用绳子往下降。

(1)descend from由…传下来的；起源于

(1)descend on袭击

(1)descend uponvt. 突然到达）；袭击（突然降临