A pitfall trap can be any small container placed in the ground with the top level with the surrounding surface and filled with a preservative.
陷阱可以是任何放置在地面上的小容器，其顶部与周围的表面齐平，并装满防腐剂。
Under cloudless skies, the surface gives up its moisture, making the ground level hotter and drier while not increasing the chances of rain.
在万里无云的天空下，地表水分蒸发，使地表更热、更干燥而无法增加形成雨的机会。
Under cloudless skies the surface heats and gives up its moisture, making things at ground level hotter and drier while not increasing the chances of rain.
这块万里无云的天空下，地表温度上升、失去水分，从而造成地面上的物质越变越热、愈加干燥，但降雨的机会却丝毫未增加。
The average level of the ground surface around the foundation wall.
在基础墙壁附近的地面表面的平整水平。
Subsurface pipe drainage in drought-prone region is superior to surface drainage in draining off water and salt, controlling ground water-level, and increasing crop output, etc.
以明沟排水为对照，论述了内陆干旱重盐碱区暗管排水在排水排盐、控制地下水位、提高土壤脱盐效果及提高作物产量等方面的优越性。
At the same time, once the surface water infiltration wall in soil, can be discharged through the masonry quickly, effectively reduce the ground water level.
同时，地表水一旦入渗墙后土中，则可以通过砌体较快地排出，有效降低地下水位。
The iron wheels of carriages ground the stones of the top level into a continually smoother and more watertight surface.
当时马车的铁轮不断地将那些碎石碾得越来越平整、防水性越好的磨损面。
The distributing trend of soil moisture contour map in under soil is rising up from bottom to surface, which indicates that ground water level has no influence on soil moisture variation.
下部土壤含水率等值线分布由底部向上都呈递增趋势，表明本次试验土壤水分动态变化不受地下水位的影响。
When standing on a level surface, the hind feet are set back from under the body and the leg from pad to hock is at right angles to the ground.
当他站在水平的地面上时，后足爪位于身躯后方(不在身躯正下方)，从脚垫到飞节垂直于地面。
Results show that the temperatures at the ground surface and in the soil decrease due to the inclusion of aerosols into the boundary layer, low-level clouds also cools the subcloud atmosphere.
模拟结果表明，边界层内低云和气溶胶都能使地面和土壤温度下降； 而低云还能使云下大气降温。
Results show that the temperatures at the ground surface and in the soil decrease due to the inclusion of aerosols into the boundary layer, low-level clouds also cools the subcloud atmosphere.
模拟结果表明，边界层内低云和气溶胶都能使地面和土壤温度下降； 而低云还能使云下大气降温。
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