Cách sử dụng
The word "sphere" refers to a three-dimensional object that is perfectly round like a ball. You might use this word when talking about shapes or objects that resemble a sphere, like a globe, a basketball, or a planet. In geometry, a sphere is a shape with a curved surface that is the same distance from its center point all around. You can also use the term "sphere" in a broader sense to refer to something that is all-encompassing, like a sphere of influence or a sphere of knowledge.