The clue type blackboard writing design is exquisite, the structure is novel, can strengthen the classroom instruction art the power.

线索式板书设计精巧、结构新颖，能增强课堂教学艺术的感染力。

This paper deals with a general-purpose knowledge engineering language ACLIPS, its key facilities and features. The design and implementation of blackboard system in ACLIPS described in detail.

本文在全面介绍通用型知识工程语言ACLIPS的主要功能和特点的基础上，重点讨论了其黑板体系结构的设计与实现方法。

The background of the paper is Status Diagnosis System in Blast Furnaces. The dissertation includes: extended blackboard model, design and realization of inference.

本论文的背景是高炉炉况诊断系统，论文主要包括扩充的时态黑板模型、推理机的设计与实现。

She chalked out a design on the blackboard.

她在黑板上画了一幅图案。

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。