中国是世界上最早使用铸币的国家。距今3000年前殷商晚期墓葬出土了不少“无文铜贝”，为最原始的金属货币。
China is the world's first country to use COINS. 3000 years ago the late shells tombs unearthed a lot of "no copper Mr Wen", as the original metal currency.
研究了硼、铜、锰对贝氏体球墨铸铁组织和性能的影响，并讨论了球墨铸铁的性能滞后现象，即等温淬火后随时间延长硬度增加的现象。
The effects of elements B, Cu and Mn on structure and mechanical properties of the Bainite ductile cast iron in above-mentioned process were investigated.
汤姆把他最珍贵的宝贝，一个壁炉柴架顶上的铜把手，拿出来从她背后绕过去给她看，说： 「求求你了，贝基，拿著这个好不好？
Tom got out his chiefest jewel, a brass knob from the top of an andiron, and passed it around her so that she could see it, and said : " please, becky, wont you take it ?"
汤姆把他最珍贵的宝贝，一个壁炉柴架顶上的铜把手，拿出来从她背后绕过去给她看，说： 「求求你了，贝基，拿著这个好不好？
Tom got out his chiefest jewel, a brass knob from the top of an andiron, and passed it around her so that she could see it, and said : " please, becky, wont you take it ?"
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