因为这个力总是垂直,于运动的方向。

The force is always perpendicular to the direction of motion.

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编织纱线趋向于沿携纱器运动的方向运动。

The braiding yarn is tended to move along the direction of the carrier movement.

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致偏磁铁用于控制质子运动的方向，使质子沿圆形路线运动。

Bending magnets are used to steer the protons along the circular path.

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So, if instead you put your particle somewhere down here on the electric field, or on the wave, the electric field will now be in the other direction so your particle will be pushed the other way.

还有方向，所以如果,你把粒子放在这下面，电场的方向相反,粒子会朝另一个方向运动。

麻省理工公开课 - 化学原理课程节选

But things which were at rest will move at a constant velocity, opposite of the velocity that you have relative to me.

这些静止的东西都在匀速运动,方向正好跟你相对我运动的速度方向相反

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Because once things started moving, it tends to move in that direction.

因为一旦事物开始改变，他们就会有朝这个方向运动的倾向。

麻省理工公开课 - 计算机科学及编程导论课程节选