Structures can be analyzed in terms of how they deal with downward forces created by gravity.
人们根据建筑物如何处理由重力产生的向下的力来分析它们。
Gravity constantly tugs downward on a slope, but only when gravity's force exceeds the strength of the rocks, soils, and sediments composing the slope does land begin to slide down hill.
重力不断的向下托拽山坡，当重力作用超过岩石、沙子和沉积物的强度，就形成滑坡，并使得地面开始沿着山坡滑落。
Finally, dangling the control pod well below the aerostat shifts the craft's centre of gravity downward. This means it does not need additional stabilisers, which add weight.
最后，悬挂在飞碟下面的液压中转控制盒使得飞行器的重心自然下移，因此不必安装其他的稳定器，从而减轻了重量。
By blowing downward these fans oppose the force of gravity, effectively lightening the vehicle.
通过向下吹风，这些风扇可以抵消引力，有效地减轻探测车的重力。
As it goes up, gravity affects it and slows down (Ease In), then it starts its downward motion more and more rapidly (Ease Out), until it hits the ground.
当他上升时，重力影响它使它变慢(缓入)，然后开始下降时动作就越来越快速(缓出)直到它弹跳到地面。
Obviously the force of gravity is acting vertically downward.
显然重力的作用垂直向下。
The results show that a downward propagating gravity wave packet can be excited by two up-going gravity wave packets owing to the nonresonant interaction.
研究表明：两个向上传播的重力波波包，通过非共振相互作用，也能激发出一个向下传播的重力波波包。
The applications of vector gravity on the determination of the earth's gravity field are described, including the downward continuation of vector gravity and determination of the local geoid.
论述了重力矢量在确定地球重力场方面的作用，包括重力矢量的向下延拓和局部大地水准面的确定。
Using this model, the airborne gravity measurement test data is downward continued based on least squares collocation and is compared with known ground gravity data.
利用所建立的模型，将航空重力测量试验数据采用最小二乘配置的方法向下延拓到地面，与地面已知重力数据进行比较。
This continual bombardment by a great number of particles keeps the piston at a certain height by opposing the force of gravity acting downward on the piston and the weights.
大量粒子的这种不断撞击，反抗着作用在活塞与重物上的向下作用的重力，因而能使活塞保持在某个高度上。
In horizontal position welding, the gravity makes molten metal flow downward and sometimes causes weld defects such as undercut and overlap.
横向焊接时由于熔化金属重力的作用，会引起熔池金属下淌，从而产生咬边以及焊瘤等焊接缺陷。
The downward continuation computation for real airborne gravity data in the Datong region of China is performed by means of these methods.
然后利用这些方法对中国大同航空重力测量数据进行向下延拓计算。
Gravity and years of bad habit kept pulling me downward.
地球引力和这些年的坏习惯总使我站不直。
It is designed for swimming learners, and maintains the center of gravity always downward and muzzles upward, and the balance is excellent.
专为学游泳人士计划，连结泳者一直重心向下，口鼻向上，平衡性极好。
It is designed for swimming learners, and maintains the center of gravity always downward and muzzles upward, and the balance is excellent.
专为学游泳人士计划，连结泳者一直重心向下，口鼻向上，平衡性极好。
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