Pi orbitals are a molecular orbital that have a nodal plane through the bond axis.
轨道是沿着键轴,有节面的分子轨道。
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。
Sigma as being cylindrically symmetric about the bond axis, and it's important to point out that it has no nodal plane across this bond axis.
键是，So, we,talk,about, a, sigma,bond，关于键轴圆柱对称的，需要着重指出的是，而且沿着键轴是没有节面的。
But in sigma orbitals, you have no nodal planes along the bond axis, so if we had a nodal plane here, we'd see an area where the wave function was equal to zero.
但在sigma轨道里，沿着轴向是没有节点平面的，如果我们有个节点，我们就会看到某个地方波函数等于0。
The electrochemical characteristics of carbon atoms on the edge and basal plane were determined by analyzing structure of graphite crystal and bond of different carbon atoms.
分析了石墨微晶结构与成键特征，研究了石墨微晶中边缘碳原子与基平面碳原子的电化学特性。
As to bonded concrete beams, complete bond between steel and concrete is always assumed, so analysis can be performed based on plane section hypothesis.
对于有粘结混凝土梁，一般认为钢筋和混凝土之间理想粘结，从而可基于平截面假定进行分析。
Remember this is our bond axis here, and you can see there is this area where the wave function is equal to zero all along that plane, that's a nodal plane.
记住这是我们的键轴，你可以看到在这些区域，波函数在这个面内全都是零，这是节点面。
Bond plane is the tache of weakness for the new and old concrete bond structure when withstanding shear force and tension. Appropriate interfacial agent can improve bond strength.
当承受剪力和拉力时，粘结面是新老砼粘结结构受力的薄弱环节，使用合适的界面剂可以提高其粘结强度。
The joining plane of two plates is like the twin boundary, but it is not a bond plane for the two martensite plates to meet with each other.
两叶片的结合部位类似于孪晶界，不是两个马氏体片相遇的接触部位。
The joining plane of two plates is like the twin boundary, but it is not a bond plane for the two martensite plates to meet with each other.
两叶片的结合部位类似于孪晶界，不是两个马氏体片相遇的接触部位。
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