That is our convention to get a unit normal vector that points to the right of the curve as we move along the curve.
这是约定的得到单位法向量的方法，这种做法使得，当沿着曲线行进时，法向量始终指向右手方向。
We work on a very small increment, get it right, and then move on to the next increment.
我们致力于非常小的进展，使它正确，然后继续下一个进展。
What is important, of course, if we get the right answer for the gravitational potential energy, that when we move away from this object that the gravitational potential energy increases.
重要的是，如果我们得到了重力，势能的正确值，当我们远离这个物体，重力势能就会，增加。
We have reached a delicate part which takes a lot of tweaking to get right, but the main idea is to use a copy of the volume, move it into place and then use the Warp Tool to simulate the curvature.
我们到了一个需要优雅地处理多处弯曲的步骤，但是，其核心方法不过是拷贝、移动和使用变形工具模仿曲线。
You must choose the right stock, predict the extent of its move, and forecast how fast it'll get there.
你必须选择正确的股票，预测它运动的程度，还要预测它运动的快慢。
So when you get to see what this happiness really is, then when you become miserable you'll move in the right direction and establish that happiness.
所以当你领悟到幸福真正所是，若你变得痛苦你就会转到正确的方向并且拥有幸福。
In fact, if you get down on the ground right now, and move your mass closer to earth's center, technically, you will speed up earth's rotation making this day shorter.
实际上，如果你现在倒在地上，然后将你自己靠近地心，严格意义上来说，你会加速地球自转，从而把一天变短。
Yeah, and don't worry about the security deposit. If everything's all right when you move out, you'll get it back.
对。对于押金您不用担心。当你搬出的时候如果一切无恙，我会退还你的。
The separation appears to get smaller as the galaxies move farther away, just like a ruler of fixed length (right-hand illustration).
随着星系对离我们越来越远，它们之间的相互距离却在缩小，就像一个尺子在远方看，单位间隔会变小一样。
The duck is thellonking about the following question. Please help it move a match and get the right answer.
小鸭子儿正在思虑底下的问题，请帮它腾挪一根火柴，患上出正确谜底。
The duck is thinking about the following question. Please help it move a match and get the right answer.
小鸭子正在思考下面的问题，请帮它挪动一根火柴，得出正确答案。
The duck is thinking about the following question. Please help it move a match and get the right answer.
小鸭子正在思考下面的问题，请帮它挪动一根火柴，得出正确答案。
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