n an indefinitely short time
n a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel
n a midwestern state in central United States; a border state during the American Civil War, Missouri was admitted to the Confederacy without actually seceding from the Union
n. 顷刻, 瞬间, 函购, 邮购, 军医, 军医主任, 汇票, 邮政汇票
[化] 分子轨道