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.

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。

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Light's new trick is fancier than a boring push: It created the more complicated force called lift, evident when a flow in one direction moves an object perpendicularly.

但是光的新特性比单纯的推力要高级：光能产生这种更复杂的作用力-提拉力，很显著的例子是一个方向的光通量可以使物体垂直移动。

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The spinning of the propellers generates the necessary lift, or upward force, to raise the platform.

螺旋推进器快速旋转，生成必要的上升力，使平台升起。

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One critical step the task force should embrace is to lift restrictions on the research public health scientists can do.

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At certain moments the air streamed against the ship as if sucked through a tunnel with a concentrated solid force of impact that seemed to lift her clean out of the water and keep her up for an instant with only a quiver running through her from end to end.

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Researchers then force them into neat parallel formations and lift the patches of wires off the water using thin films.

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