He wanted to plate copper with silver.

他想给铜容器镀银。

youdao

The craftsman plated copper with silver.

工匠给铜镀银。

youdao

Futures contracts held by speculators were up 12 percent in 2010 through October, with sharp increases in bullish bets on crude oil, copper and silver.

由于笃定原油，铜，白银看涨，投机者手中持有的期货合同到2010年10月份上升了12%。

youdao

The same with copper, silver, any commodity the hedge funds could load up on in hopes of playing the spike.

FORBES: There's No Such Thing As A Safe Haven In The Markets

Metals prices ended mixed during the reporting window of Oct.9, with gold, silver and copper prices down and platinum group metals higher.

FORBES: Funds' Bullish Positions In U.S. Precious Metals Futures, Options Continue To Grow -- CFTC

Silver Wheaton signs long-term purchase agreements with mining companies (typically gold and copper mining companies) that produce silver as a by-product.

FORBES: How Bad Will Weak Prices Ding Silver Wheaton's Earnings?