youdao

Well, at point P, the velocity vector QP is perpendicular to the line QP, 1 so the sine of that angle is one.

点P，速度向量,垂直于直线，所以该角的正弦值为。

youdao

The state space may be thought of as a big vector space with each basis element spanning the possible states of one system element (say a memory register or the CAM Angle).

状态空间可能被认为是一个大向量空间，其每个基本元素跨越一个系统元素的可能状态(比方说内存寄存器或偏心角)。

youdao