能够重合的两个圆叫做等圆（equal circle）。 一切圆的定律前提条件是在同圆或等圆中。
... 等于并平行于 equal and parallel 等圆 equal circles 等增函数 function of equal increase ...
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它可用于防治勾虫、蛔虫、蛲虫、鞭虫、粪类圆线虫等肠道寄生虫病。
Iit can be used to against hook worms, roundworm, pinworm, whipworm, Strongyloides stercoralis and other intestinal parasites.
解剖观测脐静脉、静脉导管及肝圆韧带、静脉韧带等。
Umbilical vein, ductus venosus and venous ligament and ligamentum teres hepatis were anatomized, observed and measured.
但话又说回来，一旦你拿走苹果的圆的形状和红的颜色等，那么到底什么是苹果？
But then again,what is the apple once you take away its roundness, redness, etc.?
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