copper

• Ringing a telephone now requires copper wire from the central exchange to the home .
  目前的电话铃声则需要靠从中心交换台通到用户家中的铜线进行工作。
• Air distribution piping systems almost invariably use soft copper tubing with soldered fittings .
  压缩空气的分配管道系统无例外地都是用焊接管件的铜管。
• However, according to modern theory of metals, the copper is still ionic in the metallic state .
  但是，根据最新的金属理论，铜在金属态下仍然是离子化的。
• It is noteworthy that best copper removal occurred at ph 6. 0, with the addition of ferrous sulfate only .
  显然，除铜率最高是在PH值6只加入硫酸亚铁之时。
• In many porphyry copper deposits, additional enrichment of the metal has been caused by surficial weathering .
  在许多斑岩铜矿矿床中，地表风化使得金属铜进一步富集。
• We have parted with the colt, and have only got a gross of green spectacles, with copper rims and shagreen cases .
  我们把马卖了，只得了十二打的铜边鲨皮盒的绿眼镜。
• It was the end of the workday, with the sunset burning across the mountain, and the sky shining like copper .
  一天的劳动结束了，夕阳的余辉映照山岭，把天空染成一片古铜色。
• Use a filter funnel and paper to filter the mixture of copper sulphate, sand and water into a second jar .
  用过滤漏斗和过滤纸把硫酸铜、砂子和水的混合物过滤到另一个广口瓶里。
• In this work, the copper binding capacity of several complexing agents of known stability constants was determined .
  在这一工作中，测定了几种已知稳定常数的络合剂对铜的束缚能力。
• The fracture zone carries copper and nickel near the layered intrusion but only copper at some distance from it .
  裂隙带在接近层状侵入体处含有铜镍，而在距侵入体较远处，只含有铜。