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- Elements in the first column all have one electron in their outermost shell.Those in the second column have two outer electrons, and so on. 第一列元素最外电子层内均有一个电子，第二列元素则含有两个电子，依此类推。
- A simple and useful characterization of the outer electrons in an atom is the idea of valence. 对原子外层电子的简单而有用的描述是原子价的概念。
- The vacant place is taken by one of the outer electrons which thus leaps from an outer to an inner "shell". 真空穴由一个从外“壳”跃至内“壳”的外层电子来填充。
- The outer electrons of the atoms in a metal wire move continually from one atom to another. 金属导线里原子外层电子由一个原子流向另一个原子。
- For the moment, we shall only be interested in the levels that arise from excitations of the outer electrons. 就目前而言，我们将只对由外层电子的激发所形成的能级感兴趣。
- Dust the repair to prevent adhesion to outer cover. 清整修补处以防与外胎粘连。
- The hard outer portion or surface area of bread. 面包皮面包的表面区域的硬皮
- An outer coat of glaze on a piece of pottery. 外层釉陶器釉面上的第二层釉
- The outer walls of the building were painted blue. 这座建筑的外墙被漆成了蓝色。
- A loose outer garment, such as a cape. 披风，斗篷一种宽松的外衣，例如斗篷
- Has anybody ever seen any beings from outer space? 有人见到过外星人吗?
- The transmitter was pulsed by an electron tube. 电子管使发射器产生脉冲波。
- The two modules docked in outer space. 两个飞行舱在外层空间对接。
- The outer projecting portion of the ear. 心耳耳朵的外部突出部分
- An outer corner, as of a building. 外角，如一幢建筑的外角
- The space enclosed by this outer wall. 城廓中庭用这种外墙围起来的空间
- An electron tube having a cathode and an anode. 电子二极管有一个阳极和一个阴极的电子管
- These creatures were believed to have come from outer space. 据信这种生物来自外太空。
- For all I know she may have emigrated to Outer Mongolia. 我不太清楚，她也许移民去了外蒙古。
- On the outer packing, please mark wording, "Handle with Care". 在外包装上请标明“小心轻放”字样。
