“back mark”概念、定义、翻译-科学时代

单词	back mark
释义	图书馆、情报与文献学词汇手册 back mark 脊标，书帖标记
随便看	premarital conception premarital examination premarital physical exam premarital pregnancy premarital sex premarital sexual behaviour pre-market trading premating mechanism premature premature premature premature baby premature birth premature birth premature birth premature birth premature burning premature burst premature chromosome condensation technique premature confinement premature delivery premature distribution premature dud premature ejaculation premature ejaculation

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。