The alkali concentration or alkaline quality of an alkali-containing substance.

（化学）某种碱的、表示某种碱的、具有某种碱的特性或者含有某种碱。

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The factors influencing beer spewing covered raw materials, hops, calcium oxalate, metal ions, peptide and peptide containing substance.

影响啤酒喷涌的因素有：原料、酒花、草酸钙结晶、金属离子、肽及含肽物；

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Substance X, in turn, donates its electron to an iron-containing protein called ferredoxin.

X物质又将它的电子转移给一种含铁的蛋白质，称为铁氧还蛋白。

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About a month earlier, letters containing the substance were addressed to President Barack Obama, a U.S. senator and a Mississippi judge.

WSJ: Union: NY mayor threats postmarked Shreveport, La.

An ice cream tub containing a substance believed to be human placenta has been found by a dog walker, police say.

BBC: 'Placenta' found by London dog walker

The Italy skipper, 36, took a medicine containing banned substance cortisone after a wasp sting on 28 August and failed a dope test two days later.

BBC: Angry Cannavaro cleared of doping