“open ball”的概念、定义、翻译、参考文献-科学参考

单词	open ball
释义	open ball [`ō·pǝn `bȯl] ^MATHEMATICS In a metric space, an open set about a point x which consists of all points within a fixed distance from x.
随便看	angelica oil angiectasis angiitis angina angina pectoris angioblast angiocardiography angiogenesis angiogram angiography angiokinesis angiology angioma angioneurotic edema angiopathy angioplacentography angioplasty angiosarcoma angioscotoma angiospasm angiosperm Angiospermae angiotensin angitis angle

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