atomic number 7
参考词典中atomic number 7的常规释义：
英英解释
1个名词解释
- a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues
[同] atomic number 7, n, nitrogen
点击查看……- a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues
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