Radius
01
半径, 半直径
the length of a straight line drawn from the center of a circle to any point on its outer boundary
例子
The radius of a circle is half the length of its diameter, extending from the center to any point on the circumference.
圆的半径是直径长度的一半，从圆心延伸到圆周上的任意一点。
A compass is a tool used to draw circles, with the radius adjusted to the desired measurement.
圆规是一种用来画圆的工具，半径可调整到所需的尺寸。
02
a supporting radial member of a wheel connecting the hub to the rim
例子
The bicycle 's radius snapped during the ride.
Mechanics replaced a damaged radius on the wheel.
03
a circular region defined by the distance from its center, indicated by the radius
例子
The park has a radius of 100 meters from the central fountain.
Emergency services cover a radius of 10 kilometers.
04
the outer and slightly shorter of the two bones of the human forearm
例子
He fractured his radius during the fall.
X-rays showed a clean break of the radius.
