并以点和直线的斜率举例说明绘制转盘轴承静载荷承载曲线的全过程。
The practical examples of point and line slope are given to show the complete procedure of drawing static load curve of the turntable bearings.
矢量作图更像是用铅笔画画，先拿铅笔确定一些点，然后用直线、曲线、方框和椭圆框连接这些点。
A vector drawing is like a pencil drawing where you take a pencil from one point to another and connect the points with straight lines, curved lines, rectangles, and ellipses.
这是平面法向量，和沿直线向量的点积。
It's the dot product between the normal vector of a plane and the vector along the line.
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