The alternation of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.
物体的加速度与所受的合外力成正比,与物体的质量成反比。加速度的方向与合力的方向相同。
您可以通过注意程序员对FORTRAN持续活力的态度来衡量程序员的观点。
想要行善的人在门外敲著门;爱人的,看见门是敞开的。
我喜欢讲故事,而不是解释它。
Safety is not just a policy, it's a way of life.