英语字母表的第14个字母；
同义词：normality
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同义词：nitrogenatomic number 7
the cardinal compass point that is at 0 or 360 degrees同义词：northdue northnorthward
a unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram; equal to 100,000 dynes同义词：newton
the 14th letter of the Roman alphabet同义词：letter n
n b abbr. （拉）注意（nota bene）；英国北部（North Britain）；新不伦瑞克市（New Brunswick）