全部

1·In ordinary stripping operations, the pipe falls into the wellbore under its own weight, and no additional downward force or pushing is required.

在平常的不压井起下钻作业中，管柱下入井眼是依靠其自身重量，不需要附加的向下载荷或者推力。

2·Moreover, the effect of real gas for small angle-of-attack case results in small downward force moment, whereas that for large angle-of-attack case results in small upward force moment.

此外，小攻角时真实气体效应产生小低头力矩，而大攻角时产生小抬头力矩。

3·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。

4·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。

5·Similarly, if you are in Lotus and your top knee is not on the floor, pushing that knee downward can apply enormous damaging force to the meniscus.

同样，如果你双莲花坐时因为膝盖不能落到地板上，而用力下压膝盖的话，也会对半月板造成莫大伤害。

6·The force upward equals the force downward so that the balloon stays at the level.

向上的力与向下的力相等，所以气球就维持正在这一高度。

7·The force upward equals the force downward so that the balloon stays at the level.

向上的力与向下的力相等，所以气球就保持在这一高度。

8·Obviously the force of gravity is acting vertically downward.

显然重力的作用垂直向下。

9·This force then flows into the pituitary, from whence, being now in purified form, it flows downward, cleansing and strengthening body and mind.

这种力量接着流入脑垂体，在这里，它处于净化形式，它向下流，净化和强化身体和意识。

10·Compression: a mattress pad in the horizontal surface of the force applied vertically downward, causing the mattress by the force along the direction of surface displacement.

压缩量：在水平放置的床垫垫面上施加垂直向下的力，引起床垫表面沿受力方向的位移量。