单词	sphere
释义	spheresphere /sfɪr/ ●●○ AWL noun [countable] Etymology ETYMOLOGYsphere Origin: 1200-1300 Old French espere, from Latin sphaera, from Greek sphaira ball, sphere Collocations COLLOCATIONS► perfect sphere  The Earth is not a perfect sphere (=it is not perfectly round). ► in the political/economic/public etc. sphere  reforms in the political sphere 1 something that has the shape of a ball:  The Earth is not a perfect sphere (=it is not perfectly round).2a particular area of activity, work, knowledge, etc.:  Small business is the fastest-growing sphere of the economy.in the political/economic/public etc. sphere reforms in the political sphere3math, geometry a solid object in the shape of a ball, in which every point on the surface is exactly the same distance from the center4somebody’s sphere of influence the area where a person, country, organization, etc. has power to control and change things:  America’s sphere of influence [Origin: 1200–1300 Old French espere, from Latin sphaera, from Greek sphaira ball, sphere]
随便看	sallowness sally salmon salmonella salon saloon salsa salt salt-and-pepper saltbox salt cellar saltine Salt Lake City salt marsh saltpeter salt shaker SALT Treaty salt truck saltwater salty salubrious salutary salutation salutatorian salute

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