- 1. And, this outermost shell is termed the valence shell.
- 这个最外层被称作价电子层。
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- 2. The outermost shell of the atmosphere, between the mesosphere and outer space, where temperatures increase steadily with altitude.
- 热大气层，热电离层：大气层介于中间层和外层空间之间的最外一层，在这一层中温度随高度而稳定增加。
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- 3. 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。
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- 4. 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。
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