He put his wiper control in a red metal box that on the outside had the words "For Engineering Tests Only. Do Not Open.".

他将刮水控制器放置在一个红色的金属盒子里，上面写道 “工程测试专用，切勿打开。”。

youdao

As you can see from previous image I have a Base metal layer below Red metal.

正如你在前面的图里看到的，我有一层基本金属层在红色金属下面。

youdao

China's economy may still be booming, leading to healthy industrial demand for the red metal.

中国经济也许仍在蓬勃发展，因此对于铜有着旺盛的工业需求。

youdao

Workers stand outside stores, ringing a bell and collecting money in a red metal kettle from shoppers passing by.

VOA: special.2009.11.02

Speculators in the legacy report also were net-buyers of the red metal, as their net-long increased to 23, 786 contracts.

FORBES: FOCUS: Speculators Take Big Long Positions In Gold - CFTC

This is the biggest net-short position for speculators in the disaggregated report since it started in September 2009 for the red metal.

FORBES: FOCUS: Speculators Pick Up Gold, Shed Other Precious Metals In CFTC Data

She said when that announcement came out, copper prices rose sharply, which underscores the importance the Asian nation has to the red metal.

FORBES: PDAC2012: China's Economy Should See 'Soft-Landing'; Supportive For Base Metals -- Scotiabank