拉力是一种物体在空气中所受到的阻力，它能产生与球运行方向相反的作用力，减缓球的运行速度，而升力则是一种能使物体偏离直线运行轨迹的力。
Drag is the force of air resistance pushing against a ball's motion and slowing it down, while lift is a force causing a ball to swerve off a straight path.
证明那个是巧合的时候却发现不是这样的，在六个月后重复了这个实验，此时地球正在轨道的另一边以相反的方向运行。
To check that this was not so, the experiment was repeat six months later when the Earth was travelling in the reverse direction on the opposite side of its orbit.
证明那个是巧合的时候却发现不是这样的，在六个月后重复了这个实验，此时地球正在轨道的另一边以相反的方向运行。
To check that this was not so, the experiment was repeat six months later when the Earth was travelling in the reverse direction on the opposite side of its orbit.
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