外力作用又叫外营力作用，主要是指地球表面受重力和太阳能的影响所产生的作用，包括物理和化学风化作用，流水作用，冰川作用，风力作用，波浪及海流作用等。 通常把各种外力（风化、流水、冰川、风、波浪等）对地表隆起部分逐渐蚀低的作用，统称为剥蚀作用；把流水对陆地的破坏作用，叫做侵蚀作用。外力作用总的来说是不断地起着破坏和夷平那些由内力作用而产生的隆起部分，同时把这些破坏了的碎屑物质搬运、堆积到低地和海洋中去。
双语例句原声例句
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当物体掉在地上，你认为它们不受外力作用，保持静止时，它们却朝着飞机的尾部滚去。
When objects are left at what you think is at rest with no external agency acting on them, they all slide back towards the rear end of the plane.
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一个物体如无外力作用，它将继续保持静止或作直线运动。
An object remain at rest or moves in a straight line unless a force ACTS upon it.
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弹簧在外力作用下的运动可类比地看成股价在成交量推动下的波动。
When stock prices fluctuate under the influence of volume, we can perceive this as movements of a spring caused by external force.
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That's another way of saying maintaining velocity if it's not acted upon by a force.
这就是不受外力作用时,速度保持不变的另一种说法
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First, free velocity, constant velocity can be obtained for free without doing anything.
首先,速度是无偿的,恒定速度不需外力作用就能无偿获得
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And fairly soon into the conversation I demonstrated some principle that you've probably learned in your physics class having to do with an object at rest remaining at rest unless acted upon by a force.
很快，在交谈中,我就展示了一些原理,可能你们在物理课上学过,要使静止的物体保持静止,必须有外力作用。
应用推荐
$firstVoiceSent
- 来自原声例句