“twice”概念、定义、翻译-科学时代

单词	twice
释义	数学词汇手册 twice 二次；双重
随便看	unit production cost unit profit unit pulse unit pulse unit pulse response unit pump unit purchase cost unit quantity of feeding unit record unit record machine unit record machine unit rent unit representation unit resistance unit revision unit root unit root test unit root test unit rule unitrust unitrust UNITR （United Nations Institute for Training and Research） unit sales unit seal unit separator

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。