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Use "spheres" in a sentence
"This overlap between the two spheres is worth noting and its re-emphasis is necessary."
"However, I find to stomach arguments that other completely useless things – like calculating the QCD beta function to n loops, or calculating the homotopy groups of spheres is somehow more worthy."
"Such impositions of Western values on the unwilling human populations residing within nonwestern social spheres is not wisdom, as the recent proliferation of world terrorism and the bombings of both the Kenya and Tanzania U.S."