The model consists of four layers - DDL, DML, DPL and CL.该模型分为数据定义层DDL、 数据操纵层DML 、 数据显示层DPL和控制层CL四层, 这里重点阐述了DDL和DML层.Availability of database definition language ( DDL ) and database manipulation language ( DML ) in DAO ...
Such damage is usually found to have been caused by hydrometer misuse, especially with symthetic separators.通常所发现的这种损坏是由于应用比重计不当造成的.It disturbs me profoundly that you so misuse your talents.你如此滥用自己的才能,使我深感不安.The manufact...
His dream may recall to us Rimbaud's'Le Bateau ivre ', which itself derived from Poe.他的梦使我们想起兰波的《醉舟》, 这首诗的本身也得之于坡.As you may recall, he was in the army then.你可能记得当时他正在从军。Clara moved her lips to recall rema...
There were perfectly cogent reasons why Julian Cavendish should be told of the Major's impending return.要将少校即将返回的消息告知朱利安·卡文迪什是有绝对充足的理由的。Nancy's speech was very cogent.南施的演说很有说服力.The result is a cogent explanati...