DSL includes data control layer ( DCL ) , data expression layer ( DEL ) and data access layer ( DAL ) .数据服务层包括数据控制层 、 数据表示层和数据 访问层.This method had certain guided signification to quadratic development of AutoCAD with Vis...
The rescuers were beaten back by strong winds and currents...救援人员因风浪太大而被迫中断工作。The rescuers were beaten back by strong winds and currents.救援人员因风浪太大而被迫中断工作。The water above the continental shelf is moved by the tides and by...
E - Avionics and Battery Master Switches.航空电子仪表和电池主开关.Built - in FM radio module, Chargeable lithium battery.内 置 的调频收音机模块, 收费锂电池.His car alarm had been going off for two days and, as a result, the battery was flat.他的汽车报警...