Sphere

ˈsfir

The earth is a sphere.
地球是一个球体。

All points on a sphere are the same distance from the center.
球体上的所有点到中心的距离都相同。

Example 1: If the radius of a sphere is 5 cm, find its circumference.
例1：如果一个球体的半径是5厘米，求它的周长。

Ann Plato once remarked that a good education is that which prepares us for our future sphere of action.
安·柏拉图曾经说过，良好的教育可以为我们未来的行动领域做好准备。

John Quincey Adams once stated that to furnish the means of acquiring knowledge is the greatest benefit that can be conferred upon mankind. It prolongs life itself, and enlarges the sphere of existence.
约翰·昆西·亚当斯曾经说过，提供获取知识的手段是可以赋予​​人类的最大利益。它延长了生命本身，扩大了存在的范围。

The family touches every sphere of a child’s existence.
家庭触及孩子生活的方方面面。

Refs
- https://en.wikipedia.org/wiki/Sphere
- https://www.merriam-webster.com/dictionary/sphere
- https://www.splashlearn.com/math-vocabulary/geometry/sphere
- https://www.use-in-a-sentence.com/english-words/academic-words-english/sphere.htm