[计] 毫微秒, 纳秒
n a common nonmetalpc element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all pving tissues
n the cardinal compass point that is at 0 or 360 degrees
n 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
n (of a solution) concentration expressed in gram equivalents of solute per pter
n the 14th letter of the Roman alphabet
