来自澳大利亚、加拿大和美国等国家的科学证据清楚地表明，这种鸟类的数量下降了。
The scientific evidence from countries like Australia, Canada, and the USA clearly indicates a decline in the birds' numbers.
因此靠近地表的空气温度降低，使得云层下降，减少了降水的几率。
This cooled the air near the surface, drawing clouds downward and reducing the chance of rain.
传统的地热发电厂利用了这样一种自然系统，即水分下降至地壳的渗透岩层中，而后又受热蒸腾到地表。
Traditional geothermal plants exploit natural systems in which water seeps down into porous rocks in the ground and emerges back at the surface at a high temperature.
同时因为计算与实验室的实验复制的金星地表与大气层的活动，表明辐射率一直在下降，所以辐射率能够成为某个地质年代的一个重要指标。
Because calculations and lab experiments replicating the Venusian surface and atmosphere show that emissivity decreases over time, emissivity can be an important indicator of a substance's age.
在最近几个月尽管入境游客略微有所下降，但澳大利亚旅游业仍比许多竞争目的地表现要好，而市场占有率也有所增加。
Despite modest declines in arrivals to Australia over recent months, Australia continues to out-perform many competing destinations and as a result has gained market share.
这是地球陆地表面的最低点,这急剧下降是在很短的地理范围内。
That is the lowest point on the earth's land surface so this dramatic drop in just a very short geographical area.
云量增加导致日平均地表温度下降。
Any increase in cloudiness will lead to falling of diurnal mean surface temperature.
降水和地表径流的减少以及地下水的严重超采是引起地下水位下降的主要原因。
The decrease of precipitation and surface water and over-exploitation are the main reasons that result in groundwater level decline.
中国北方平原的城镇同时还面临地表水位下降的困难。
Towns and cities are also facing difficulties as ground water levels fall in the major north China plains, he added.
布设机械沙障可使退化梭梭林地表粗糙度增大，林内近地面层风速、输沙量显著下降。
By setting up mechanical sand barriers on degenerated Haloxylon ammodendron woodland, the roughness of woodland increased; the wind speed an.
在矿井自然疏水条件下第四含水层(底含水层)水位大幅度下降，随之发生地表大面积沉降。
Under the natural drainage conditions of the mine shafts, the water level of the 4th aquifer lowers considerably. Thence, large area of ground subsidence occurs.
西伯利亚下降流，规模大，从地表下降到下地幔下部；
严重的水土流失不但可以导致生态环境恶化，而且对地表土层的破坏，会使土地的生产能力下降，影响农业生产。
The water and soil loss not only bring on entironment worsement, but also reduced the capacity of ground yield by destroy surface layer of soil.
该病是一种土传病害，主要危害甜橙类柑桔树近地表根颈部，引起腐烂，导致树势下降。
It mainly damages basal stock of sweet orange trees, inducing foot rot, tree declining, yield decreasing, even tree death.
该病是一种土传病害，主要危害甜橙类柑桔树近地表根颈部，引起腐烂，导致树势下降。
It mainly damages basal stock of sweet orange trees, inducing foot rot, tree declining, yield decreasing, even tree death.
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