sphere
noun [ C ] uk/sfɪər/ us/sfɪr/
(ROUND OBJECT)
球，圆球;球状物
an object shaped like a round ball
Doctors have replaced the top of his hip bone with a metal sphere. 医生们用一个金属球替换了他的髋骨顶端。
(AREA)
C1 （知识、工作等的）范围，领域，圈，界
a subject or area of knowledge, work, etc.
the political sphere 政界
exchanges with other countries, particularly in cultural, scientific, and economic spheres 与其他国家的交流，特别是在文化、科学和经济领域