X direction X方向 ; x轴方向
X direction reference at start 方向参照
x-direction feed x向进给
x-direction entrance 入点横坐标
x-direction movement x方向位移
Fig6 Stress distribution in X-direction 图
x & y direction 涂膜方向
Fig8 Displacement distribution in X-direction 图
x axis direction x轴方向
The disturbances advances in the X-direction as a so-called surface or evanescent wave.
这个扰动作为一个所谓表面波或倏逝波沿着X方向行进。
A negative face has an outward normal pointing in a direction opposite that of the positive x-axis.
负向的外法线指向与正x轴相反的方向。
There is no acceleration in the y direction, only in x direction when it starts moving, and that's why we split it.
在y方向上没有加速度，只有在x方向上移动时才有，这就是分解它的原因。
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