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 ...
We started to use a simple clinometer, graphical reduction of distance to draw maps in caves.我们开始使用一种简单的测斜器, 减少图解距离,并绘制出关于凹陷的地图.The caves extend for some 18 kilo-metres.那些洞穴深约18公里。The caves extend for some 18 kilometres....
An important romantic relationship may begin to captivate you this month, too.这个月某段重要的感情关系也会开始迷惑你.I would captivate them with money before telling them that we needed to deforest their land.我会先用钱迷惑住他们,然后再告诉他们我们要采伐森林.Comp...
Normally a point in space is identified by means of coordinates.空间中的点通常是依靠座标来定位的.We carry out a transformation to spherical polar coordinates.我们变换成球极坐标.For a system, Hamiltonian is invariant under any translation of spat...
A witness swears by the Bible that he will tell the truth.证人对着圣经发誓保证据实直言.He swears by short naps or even just stretching out in bed for a few minutes.他深信白天小睡片刻,哪怕是在床上躺几分钟也是好的.He always swears and blasphemes when he'...
本赛季该俱乐部已经有73,500名持有季票的观众。This season the club has had 73,500 season-ticket holders.该规定适用于持有公司股票的人。The rule applies where a person owns stock in a corporation.让守法的人持有枪械并不会惹麻烦。Gun ownership by law-abiding people was not a ...
The disadvantage is that it is not universally available...缺点在于它并不是随处都可获得。One of the fundamental bars to communication is the lack of a universally spoken, common language...交流的一个基本障碍就是缺少一种大家都说的通用语。The standardized fitti...