这种几何图相就是机构运动简图和它的速度、加速度矢量图。

The figures of spatial mechanisms and their vector diagrams of velocity and acceleration can also be transformed by those operators.

youdao

运用矢量法建立机构的位移矢量方程，推导出速度、加速度矢量方程。

Establish displacement vector equation of mechanism using vector method to infer the speed and the acceleration vector equation.

youdao

加速度和速度都是矢量。

Acceleration and velocity are both vectors.

《牛津词典》

The advantage of introducing that guy is that if you like, I can now write an equation for the acceleration as a vector.

引入它的好处是,如果你愿意的话,我可以把加速度写成矢量形式

耶鲁公开课 - 基础物理课程节选

I want to consider a particle which has definite acceleration a, a constant one, but a is now a vector.

我想考虑一个加速度为 a 的质点,加速度恒定,但 a 是一个矢量

耶鲁公开课 - 基础物理课程节选

You can take a derivative of the derivative and you can get the acceleration vector, will be d^2r over dt^2, and you can also write it as dv over dt.

你可以对导数再求一次导,你就可以得到加速度矢量,也就是 d^2 r / dt^2,你也可以写成 dv / dt

耶鲁公开课 - 基础物理课程节选