In either case our forward motion wouldn't receive an absolute check.

总之，船的前进是不能完全被阻止的。

Under normal rolling conditions, the forward motion of the suitcase is perpendicular to the wheels' axis of rotation.

在正常滚动的情况下，行李箱的前进运动与轮子的转动轴垂直。

But the long sweep of America has been defined by forward motion, a constant widening of our founding creed to embrace all, and not just some.

可美国一路走来，不断前进，我们初心不忘，福泽弥远，而非利及少数。

And that example should inspire all of us, that the only way forward is forward motion.

这个例子应该激励我们所有人，前进的唯一途径就是前进。

And knowing where my feet are and the strides I'm taking, we can use software to control the floor to undo my forward motion or my sideways motion.

知道我的脚在哪儿和步伐后，我们可以使用软件来控制地板，抵消我向前或侧向的运动。

The middle part of the tongue lifts and presses against the roof of the mouth in an up and forward motion, yyy.

舌头的中部向上和向前抬起并压在上颚上，yyy。

The forward motion of the plane would make the air go into the combustion chamber and thus produce exhaust in great speed.

飞机向前运动会使空气进入燃烧室，从而以极快的速度产生废气。

The muscles attached to this and they helped move the leg in very powerful forward motion in this case for this dinosaur.

附着在上面的肌肉在这种情况下帮助这只恐龙以非常强大的向前运动的方式移动腿部。

The fish pushes water aside by the forward motion of its head, and with the curve of its body and its flexible tail.

鱼通过头部的向前运动、身体的曲线和灵活的尾巴将水推到一边。

And the peg-like teeth on the roof of its mouth could have broken down those bites using a forward and backward chewing motion.

它嘴巴顶部的钉状牙齿可以通过向前和向后的咀嚼动作来分解那些咬伤。

The forward motion makes the air flow over the airplane's wings and creates the differences in pressure—it creates the lift needed for the plane to overcome gravity.

向前的运动使气流流过飞机机翼并产生压力差，从而产生飞机克服重力所需的升力。

But when people are in orbit, like aboard the International Space Station, their forward motion is fast enough that when gravity pulls them down, they fall around the curve of the planet.

但是当人们在轨道上时， 就像在国际空间站上一样，他们的向前运动速度足够快， 以至于当重力将他们拉下来时， 他们会沿着地球的曲线坠落。