Remember, partial f, partial x was obtained by y That means I am slicing the graph of f by a plane that is parallel to the x, z plane.
要记得，在这里的fx中,是作为常量保持不变的。，looking，at，the，situation，where，y，is，held，constant。,这是我用一个平行于xz坐标系的平面,横截了f，所得到的图形。
Yes? Yeah, so I'm saying when you fix theta you get only a half plane, not a full plane I mean, it goes all the way up and down, but it doesn't go back to the other side of the z axis. Why?
请说，所以我说当固定θ时,得到的是半平面，而非全平面,它布满z-轴的一侧,但从不延伸到z-轴的另一侧，为什么？
So PI bonds have electron density both above and below the bond axis, but they actually have a nodal plane at this z, this bond axis here.
键在键轴之上，和之下都有电子密度，但它们在z方向有节面，这是键轴的地方。
Z: What time will your plane take off?
你的飞机什么时候起飞啊？
Z points toward the sky and is perpendicular to the ground plane.
值朝向天空方向，与地面垂直相交。
A quasi two-dimensional transverse electrical discharge model is developed with which contours with constant unsaturated gain G0 in X-Z plane are obtained.
用一维气流、准二维放电模型算出垂直于电极平面的等增益线二维分布。
A quasi two-dimensional transverse electrical discharge model is developed with which contours with constant unsaturated gain G0 in X-Z plane are obtained.
用一维气流、准二维放电模型算出垂直于电极平面的等增益线二维分布。
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