alkali
alkali
[ˈalkəlʌɪ]
(pl. alkalis)
语源
[ˈalkəlʌɪ]
(pl. alkalis)
- a compound with particular chemical properties including turning litmus blue and neutralizing or effervescing with acids; typically, a caustic or corrosive substance of this kind such as lime or soda
碱。 常与 acid 相对
■[as modifier](chiefly N. Amer.)alkaline
(主 北美)碱的 - Alkalis release hydroxide ions (OH-) when dissolved in water. Any solution with a pH of more than 7 is alkaline
语源
- late Middle English (denoting a saline substance derived from the ashes of various plants, including glasswort): from medieval Latin, from Arabic al-k̦alī 'calcined ashes (of the glasswort etc.'), from k̦alā 'fry, roast'
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- beforetime adv.以前，从前
- befoul vt.弄臭, 弄脏,使堕落, 败坏
- befriend vt.以朋友的方式对待,帮助,照顾
- befringe v.饰以边
- befrogged adj.饰有盘花钮扣的
- befuddle vt.使烂醉,使迷惑不解
- beg vt.& vi.乞讨,恳求（原谅）,回避（问题）
- begad int.天哪（一种发誓或强调的虚词，多用于幽默谈话中）
- began v.开始( begin的过去式 ),着手,创始,创办
- begar n.<印地>强迫劳动，苦役
- begat v.<废>beget的过去式
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