bis- 📖 中文释义 [医] 二, 两个, 两次, 双 📘 English Definition(英文释义) pref. A form of Bi-, sometimes used before s, c, or a vowel. ← bis(triphenylphosphine)dicarbonyl nickel B 字母词表 bis-(4-dimethylaminodithiobenzil)-nickel →