“second axiom of countability”概念、定义、翻译-科学时代

单词	second axiom of countability
释义	数学词汇手册 second axiom of countability 第二可数（性）公理
随便看	close attack close binary close binary galaxy close binary star close binary system close block stacking close bread close canopy close classification close classification close combat close combat air-to-air missile close company close company close company close control close cooperation close-couple close covering group close crossing close-crowned tree closed closed account closed account closed air conditioning system

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。