“parts per billion--parts per billion (ppb)”概念、定义、翻译-科学时代

单词	parts per billion--parts per billion (ppb)
释义	水利水电词汇手册 parts per billion (ppb) 十亿分率，十亿分之
随便看	difficult labour difficult material difficulty difficulty in delivery difficulty of learning Diffie-Hellman Diffie-Hellmanf Diffie-Hellmanf加密算法 Diffie-Hellman key exchange Diffie-Hellman加密协议 diffluence diffluence diffluent river diffluent stream diffracted wave diffracted wave diffracted wave vector diffraction diffraction diffraction diffraction diffraction diffraction diffraction diffraction

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。

parts per billion (ppb)