axis

名词 axis:

a straight line through a body or figure that satisfies certain conditions

the center around which something rotates

the main stem or central part about which plant organs or plant parts such as branches are arranged

in World War II the alliance of Germany and Italy in 1936 which later included Japan and other nations

a group of countries in special alliance

同义词：bloc

the 2nd cervical vertebra; serves as a pivot for turning the head