生铁可含百分之四的碳.Pig iron may contain 4％ of carbon.独立战争前夕，北美十三州每年生产3万吨生铁。On the eve of the Revolution, the colonies produced thirty thousand tons of crude iron a year.并非一概如此 — 例如从低级铁矿石中生产生铁和钢材的情况一但是这导致了工业发展集中在煤田上.This is not a...
他仍然是维系该国脆弱的政治平衡的支柱。He remains the anchor of the country's fragile political balance.他不久就会成为英格兰队的支柱。He will shortly become the fulcrum of the England team.他是她的精神支柱。He provided an emotional anchor for her....