Every body continues in its state of rest, or in uniform motion in a straight line unless it is compelled to change that state by forces impressed upon it.
物体都保持静止的或沿一条直线作匀速运动的状态，速运动的状态，除非作用在它上面的力迫使它改变这种状态。使它改变这种状态。
If a body is kept free of the action of forces, it will remain in its state of rest or of uniform motion in a straight line.
物体如果不受外力的作用，将保持静止的状态或沿直线作匀速运动。
Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.
每一个物体都保持它自身的静止的或者一直向前均匀地运动的状态，除非由外加的力迫使它改变它自身的状态为止。
Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.
每一个物体都保持它自身的静止的或者一直向前均匀地运动的状态，除非由外加的力迫使它改变它自身的状态为止。
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