“contractible space”概念、定义、翻译-科学时代

单词	contractible space
释义	数学词汇手册 contractible space 可缩空间
随便看	mine burying mine cable mine chamber mine clearance mine-clearing rocket（projectile） mine climate mine coal mine concession mine conditions mine conveying mine countermeasures mine dangerous area mine delivering rocket mine destruction mine detection mine-discarding mine disposal officer mined out space mine drainage gas mine explosion mine explosion mine explosive minefield mine field mine fire truck

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。