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 ...
" And then he disappears at the turn of the pass , Leaving behind him only hoof - prints . "山 回路 转不见 君, 雪上空留马行处.Face the fearful with no fears , and its fearfulness disappears.见怪不怪, 其怪自败.But only a block away the insiste...
" Bought it off'n Ben Rogers two weeks ago for a hoop - stick. "“ 两星期前用一根推铁环的棍子和贝恩-罗杰换的. ”He would get rid of Rogers and Laird at the earliest opportunity.只要有机会,他就会尽早抛弃罗杰斯和莱尔德.The Australian chess grandmaster Ian Ro...
The wrong shampoo can leave curly hair in a tangled mess.不合适的洗发水会使卷发纠结成乱糟糟的一团。Your hair’s so tangled that I can’t comb it.你的头发太乱了,我梳不动。The themes get tangled in Mr. Mahfouz's epic storytelling...马赫福兹先生讲述的故事过于宏大，主题有些...
During these periods the birds will lie on the cage floor as if trying to lay or hatch eggs.这些时期，鸟儿会趴在笼底，好像在下蛋或孵蛋。Inspecting fitting accuracy of hatch coaming on board.货舱口围板船上安装精度检查.Within a week, small footless larvae h...
Study the floatability of andalusite and mechanism of which with alkyl sulphonate as collecter was accomplished.研究了红柱石的可浮性及其与捕收剂烷基磺酸盐的作用机理.There are abundant mineral resources, andalusite, marble, granite, gold and other...