铅是早在古代就已知的金属之一。Lead was one of the metals known to the ancient world.水银是一种已知的有毒物质。Mercury is a known poison.人们通常从已知的事实中推断未知的事实.People usually infer an unknown fact from a known fact....
The capo - mafioso sighed. " Well, then, marriage it will have to be.这位黑帮头目长叹了一口气: “ 那, 好吧, 结婚看来是势在必行的.People turned to their local capo - mafioso for help in every emergency.一到紧要关头,人们总是去向当地的黑帮头头要求帮助....
Her bottom lip quivered and big tears rolled down her cheeks.她的下唇颤抖着，豆大的泪珠顺着面颊滚落下来。The blades of grass quivered in the wind.草叶随风颤动.The lip of that confounded cub, the second mate, quivered visibly.二副, 那个惊慌失措的小伙子的嘴唇明显地哆嗦起...
吉布斯提出用等边三角形作图, 这已成为三元体系的标准方法.Gibbs suggested the use of an equilateraltriangle plot, and this has become standard for ternary systems.你相信有关在伊拉克掩护的事情吗, 吉布斯?You believe that story about a cover - up in Iraq, Gibbs?假如你是个病菌,...
展出的有用玉石 、 琥珀和紫水晶做的耳环 、 项链和手镯.On display are earrings, necklaces and bracelets made from jade, amber and amethyst.本厂 长期 供应和生产玉石与玛瑙制品.This factory long - term supply and production jade and agate product.本文提出玉石品种鉴定的新方法———激...