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2000年悉尼奥运会后,正式的国际乒乓球比赛便开始使用新规格的球。它的直径是40毫米,重2.7克,而原来球的直径为
After the Sydney Olympic Games in 2000, formal international table tennis competitions began to use the new specifications of the ball. Its diameter is 40 mm and weighs 2.7 grams, while the original ball has a diameter of