Harry got to his feet, trod on the hem of his robes, and stumbled slightly.

哈利站了起来，踩在长袍的底边上，微微绊了一下。

I like the cut and hemline of these shorts so I think I'll wear these as well.

我喜欢这些短裤的裁剪和底边。所以我也想穿这些。

Well the height has some dimension, but the base, what's the width the a line?

好吧， 高有一定的尺寸， 但底边，一条线的多少？

And because the quantum dots only absorb shorter wavelengths, those re-emitted waves travel through the pane without being re-absorbed by other dots.

重新释放的辐射开有吸收到短辐射的点当它们到达底边时，再透过太阳能板来转换成电能。

So let's say this has a base of 1, to calculate this area which I use as an approximation.

假设这个底边为1，我用来计算这个面积，作为近似值。

The diameter is one base of the triangle, and then the distance to the Earth is the other two legs.

直径作为三角形的一个底边，而到地球的距离则构成了另外两条边。

The area of this parallelogram is its base, 1, times the height perpendicular to that base, which is the y-coordinate of our input vector.

这个平行四边形的面积其底边，1， 乘以垂直于该底边的高，即输入向量的y坐标。

So you could figure out the area of that trapezoid, taking the average of that point and that point, and multiplying it by the base.

因此， 你可以计算出这个梯形的面积，先求出这两点的平均值， 再乘以底边长。

Again the symmetry maybe helps make this clear, but  more rigorously they both have the same base, they both have a 90 degree angle, and they  both have the same height, so it follows by the side-angle-side relation.

再次通过对称性也许能更清楚地说明这一点，但更严谨地说， 它们的底边相同，都有一个90角， 并且高也相同，因此根据边角边关系可以得出结论。