名词

1. （假想的）轴;轴线
An axis is an imaginary line through the middle of something.

2. （坐标）轴
An axis of a graph is one of the two lines on which the scales of measurement are marked.

1. the center around which something rotates

Synonym: axis of rotation

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

Synonym: axis vertebra

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

4. a group of countries in special alliance

Synonym: bloc

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