The problem wasn't the size of banks or their mixture of commercial and investment banking.

问题不在于银行的尺寸或者商业和投行业 混业经营。

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The stone material is selected from limestone, diabase, basalt, copper ore, iron ore, or their mixture;

其中，石料可选择石灰岩、灰绿岩、玄武岩、铜矿石、铁矿石等物质或其混和物；

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In the presence of some special surfactants such as Arabic gum, polyvinyl alcohol or their mixture, the associated ion is soluble in water, accompanied with very sensitive color change.

在某些特殊型表面活性剂，如阿拉伯树胶、聚乙烯醇或其混合溶液的存在下，离子缔合物溶于水，并伴有极灵敏的颜色变化。

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The inner two appear, from their densities, to have a lot of water or methane or ammonia in them (or any mixture of the three), along with hydrogen and helium.

ECONOMIST: The search for other Earths is hotting up

Was his mixture of romanticism and classicism genuine and organic or merely mechanical, a matter of putting themes doggedly through their paces?

ECONOMIST: How Brahms saved music from Wagner