It will build a smelter to refine copper ore, and a railroad to carry coal to the power plant and copper back to China.

它还将建设一座冶炼厂来提炼铜矿石，同时建设一条铁路，一方面向发电站运输煤矿，另一方面把这些铜运回中国。

youdao

So, hopefully, if you were to go back and look you could see that this is, in fact, copper.

因此，我希望大家如果回去再看一遍,这个题目的话，能够知道这是铜原子。

麻省理工公开课 - 化学原理课程节选

Still, copper prices were back under pressure despite a short-lived bounce off 18-month lows Thursday.

WSJ: European Stocks Gain, Yen Slides

In copper, speculators switched back to net-short positions for the first time since Nov. 27.

FORBES: FOCUS: Speculators' Net-Long Position In Gold Rebounds Temporarily - CFTC

Copper bulls and bears are back on a level near-term technical playing field.

FORBES: Comex Gold Ends Higher amid Bullish "Outside Markets"