x Well, we know how to compute partial w over partial x y or partial w over partial y, which measure how w changes if I move in the direction of the x axis or in the direction of the y axis.

我们知道如何计算∂w/∂,或者∂w/∂,这衡量了我在x轴,或者y轴方向上移动时，w的变化。

youdao

Move with the X axis micrometric movement the sharp shadow, till the digital comparator red light is on the zero right position.

微调移动X 轴接近“十”字比较尺，直到数字比较器的指示灯在零点右边变亮。

youdao

X-Y working platform can be move along X-axis and Y-axis.

工作台是指能分别沿着X向和Y向移动的工作台。

youdao

You cannot answer that, even if I promised to move only along the x-axis, because I think...I don't want to pose this as a question, because I think the answer is fairly obvious to everybody.

即使我保证只在 x 轴上移动,你们仍然无法回答,因为我觉得...我不想将其作为一个问题,因为我认为答案是显而易见的

耶鲁公开课 - 基础物理课程节选