12c., a merger of Old English ora "ore, unworked metal" (related to eorþe "earth," see earth; and cognate with Low German ur "iron-containing ore," Dutch oer, Old Norse aurr "gravel"); and Old English ar "brass, copper, bronze," from Proto-Germanic *ajiz- (cognates: Old Norse eir "brass, copper," German ehern "brazen," Gothic aiz "bronze"), from PIE root *aus- (2) "gold" (see aureate). The two words were not fully assimilated till 17c.; what emerged has the form of ar but the meaning of ora.
实用例句
1. We dowse oil and ore in South America for big companies.
我们在南美洲为一些大公司探测石油和矿石。
来自柯林斯例句
2. They struck a rich seam of iron ore.
他们开出一个富铁矿层。
来自《权威词典》
3. How many tons of ore can this machine crush in an hour?
这机器每小时可以破碎多少吨矿石?
来自《现代汉英综合大词典》
4. The net profit amounts to 20 dollars per ton of ore.
