湯偉晉 (WeiJin Tang) 編寫的字典 (電子郵件: WeiJin.Tang@gmail.com)(行動電話_湯偉晉_0958-227-243_as_of_2011-01-09_)
English-Chinese Online Dictionary,英文-中文 線上字典(詞典),中英字典,英中字典,中英文字典, English Dictionary by WeiJin Tang (湯偉晉 編寫的英文字典)
2022年6月24日 星期五
quaternary ammonium compound
quaternary ammonium compound : any of numerous strong bases and their salts derived from ammonium by replacement of the hydrogen atoms with organic radicals and important especially as surface-active agents, disinfectants, and drugs
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