x zero gear 零变位齿轮
X-zero gear 非变位齿轮
F-Zero X 未来赛车 ; 将来赛车
X-zero gear pair 非变位齿轮副
Zero X 未来赛车
T-zero Turbo X 星际赛车
So, at that point, the partial derivative is zero with respect to x.
因此这点上x的偏导为零。
The new version of the application is the extremely short line running along the X-axis at zero, while the previous version is the longer higher line.
修改后的应用程序沿着x轴零点的线条非常短，而以前的应用程序的线条则又长又高。
So the signs in the velocity and the signs in average acceleration depend crucially on how I have defined my increasing value of x not where I choose my zero points.
所以速度的符号,和平均加速度的符号,这二者都取决于,这里x正方向,是如何定义的,和0点的选取没有关系。
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