对于双取代络合物ma4b2，其平面排列有三个异构体，常见的为有机化学中的邻位、间位和对位排列。
FOR a disubstituted complex, MA4B2, the planar arrangement gives three isomers, the familiar ortho, meta, and para arrangements of organic chemistry.
石墨烯是一种只有单原子厚度的碳原子平面层——碳原子按蜂窝状晶格排列。
Graphene is a flat sheet of carbon just one atom thick—with the carbon atoms arranged in a honeycomb lattice.
在未来几十年没有行星直线排列问题，地球也不会在2012年跨越银河平面，即使出现此类排列方式，对地球的影响也可以忽略不计。
There are no planetary alignments in the next few decades, Earth will not cross the galactic plane in 2012, and even if these alignments were to occur, their effects on the Earth would be negligible.
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