“optional valent”概念、定义、翻译-科学时代

单词	optional valent
释义	语言学词汇手册 optional valent 非强制配价
随便看	half-space half-span house half staff half step half stitch half stock half stock half stuff beater half-symmetric lens half-symmetric resonator half thickness half-through bridge half tide half-tide level half timber half-timbering half-time half-time half-time half time of exchange half tint half-title half title half title page half toes

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。

optional valent