The £5 banknote was first issued at the end of the 18th century...五英镑面值的钞票最早在18世纪末发行。The £5 banknote was first issued at the end of the 18th century.五英镑面值的钞票最早在18世纪末发行。The watermark on the banknote is to prevent forgery....
Thirteen per cent of Christie's coin and banknote auction went unsold.佳士得13%的硬币和纸币拍卖流拍。The £5 banknote was first issued at the end of the 18th century.五英镑面值的钞票最早在18世纪末发行。The watermark on the banknote is to prevent f...
石棉能用来使烹调用的炉灶绝热.Asbestos can be used to insulate a cooking stove.脂肪是极好的抵御寒冷的绝热体。Fat is an excellent insulator against the cold.从物理学上讲,两种介质之间不可能有完全的绝热.Physically it is impossible to have complete thermal insulation between...