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- This paper analyzes and evaluates the different kinds of representation methods, describes the concepts of blackboard model,knowledge source,and blackboard framework,and gives a rigorous BNF definition to the blackboard framework. 文中还对目前各种知识表达方法进行了评价,对黑板模型、知识源、黑板框架的概念进行了描述,并对黑板框架给出了严格的BNF定义。
- A slogan is over the blackboard. 一条标语在黑板正上方。
- The teacher wrote on the blackboard with a piece of chalk. 老师用一支粉笔在黑板上写字。
- It's a bridge of steel framework. 那是座钢铁结构的桥梁。
- The teacher's chalk grated on the blackboard. 老师的粉笔在黑板上发出刺耳的摩擦声。
- The teacher erased the letters on the blackboard. 老师擦掉了黑板上的字母。
- The teacher chalked out a design on the blackboard. 老师用粉笔在黑板上勾画出一个图案。
- The blackboard is in the front of the classroom. 黑板在教室的前面。
- Please raise your head and look at the blackboard. 请抬起头来，看黑板。
- Who's rubbed my figures off the blackboard? 谁把我写在黑板上的数字擦掉了?
- blackboard framework 黑板框架
- A framework to support or strengthen a mine or shaft. 井壁基架用来支承或加固矿井的构筑
- The teacher wrote down the new words on the blackboard. 老师在黑板上写出新单词。
- A framework of crisscrossed or parallel bars; a grating or mesh. 格栅，网栅由交叉或平行的条构成的架子，格栅或网格
- He took out a piece of chalk and wrote his problem on the blackboard. 他拿出了一支粉笔并在黑板上写下他的问题。
- A structure made with timbers, as the framework of a boat or house. 木结构如船或房屋的木架结构等用木料造的结构
- The room was furnished with some old tables, a blackboard, and an old stove. 这间房子里有一些旧桌子，一块黑板和一个旧的火炉。
- The planking applied to the interior framework of a ship. 舱室内覆板用作船内部框架的木板
- The blackboard has been wiped clean. 黑板擦干净了。
- His chalk scraped on the blackboard. 他的粉笔在黑板上擦擦作声。
