1.
Siberian clod downwelling is from surface dive to near CMB;
西伯利亚下降流，规模大，从地表下降到下地幔下部；
2.
critical rate of fall of commutating current
换向电流临界下降率
3.
the houses were swept away in the torrent.
暴雨沿陡坡下降形成急流。
4.
In real terms, the drop in net capital flows was even large.
按实际价值计，净资本流入量下降更大。
5.
Ascent/descent lines, deco bar, current lines.
上升/下降绳，安全栅栏，潮流绳。
6.
Unsteady Seepage Test under Condition of Rapid Drawdown
水位降落条件下非稳定渗流试验研究
7.
Characteristics of Nitrogen Loss on Slope Under Simulated Rainfall
模拟降雨条件下坡地氮流失特征研究
8.
a local region of low pressure or descending air that causes a plane to lose height suddenly.
使飞机突然下降的向下气流或局部低气压地区。
9.
Groundwater Transient Seepage Field Simulation Subjected to Heavy Rainfall
强降雨下边坡地下水暂态渗流场模拟途径研究
10.
Substances Transport in an Underground River of Typical Karst Watershed During Storm Events
降雨条件下典型岩溶流域地下水中的物质运移
11.
Research on causes and countermeasures of groundwater level drop in the Shiyang River Basin
石羊河流域地下水水位下降原因及对策研究
12.
(meteorology) of an air current or wind; moving downward or down a slope because of cooling especially at night.
（气象学）指气流或者风；特别是在晚上因为降温而下降或者沿斜面下降。
13.
the unreasonable development of the water resources has led to the draught-up of rivers, shrinking of lakes and oasis and decrease of ground water tables;
水资源不合理开发导致河流断流，湖泊绿洲萎缩，地下水位下降；
14.
The relationships among preferential flow, infiltrated flow and surface runoff were analyzed.
结果表明，在同等降雨条件下，优先流晚于渗流出现，早于渗流停止。
15.
Heavy rainfall makes a river rise while continuous dry weather makes a river sink.
大量降雨会使河水上涨，而连续干旱又会使河流水位下降。
16.
To descend by means of a parachute.
跳伞，伞降用降落伞下降
17.
HIV's prevalence is dropping in southern India.
在印度南方艾滋病病毒的流行也开始有所下降。
18.
Frontal thunderstorm over the field， up and down drafts up to40 knots.
锋面雷雨过境，上升下降气流达40海里每秒。