五石，文言用语，可指五种石料或五色琉璃。另可理解为"五色石"、"五石散"的简称。五石也可形容容积。
我把它种在地里，不久，真的结了个很大的葫芦，恐怕装得下五石谷子。
Soon afterwards a big gourd which could hold 5 Dan of rice really grew in the field.
五石油炼制业：指以石油为原料，经蒸馏、精炼及掺配之炼制程序，从事制造石油制品之事业。
Oil refinery: Refers to a business that uses oil as its raw material to engage in the manufacture of petroleum products through the process of distillation, refining, or blending.
有五种宝石供选择，分别是蓝色托帕石、不纯蛋白石、缟玛瑙、蓝宝石和红宝石。
There are five options for the gemstone: blue topaz, opalite, onyx, sapphire and ruby.
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