" Longitude" are lines that are " perpendicular, " they're at a right angle to latitude lines.

“经度”是“垂直”的线，它们与纬度线成直角。

But what if we point the cones so that the mirror is now at a right angle to the plane of symmetry?

但是如果我们把锥体指向镜面，使镜面与对称面成直角呢？

Now, here we have a perpendicular line, means straight at 90 degrees or at a right angle to another line.

现在，这里我们有一条垂直线，意思是与另一条线成 90 度角或直角。

In order to describe human beings he should keep the palm of his hand at a right angle to the floor.

为了描述人类，他应该让手掌与地板成直角。

A table could also have a sharp edge where the two pieces of wood meet or where there is a corner, a right angle, to the wood.

一张桌子也可以有一个锋利的边缘，在两块木头相遇的地方或有一个角，与木头成直角的地方。

" You have to play in a boxed area and you have to stand at a right angle to the wind, " he said proudly. " And you can't use aluminum to make your glass string" .

" 你必须在指定的区域放风筝，并且你必须站在风向成直角的地方。" 他骄傲地说，" 还有，你不能用铝来做玻璃线。"