“负半定二次型”概念、定义、翻译-科学时代

单词	负半定二次型
释义	数学词汇手册负半定二次型 negative semi-definite quadratic form
随便看	bullet bond bullet-defying bullet drop bulleted blank bullet gun perforator bullet impact test bulletin bulletin bulletin bulletin bulletin bulletin bulletin bulletin bulletin board bulletin board display bulletin board of school honours bulletin board system Bulletin Board System bulletin board system bulletin board system (BBS) bulletin board system (BBS) bulletin board system (BBS) Bulletin Board System (BBS) bulletin board system (BBS)

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。