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
the cardinal compass point that is at 0 or 360 degrees
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
(of a solution) concentration expressed in gram equivalents of solute per liter
the 14th letter of the Roman alphabet
造句
He fought in the N African campaign during the last war. 在上次戰爭中他在北非戰役參戰。