学生作业纸

The North End is thus a recurring assignment for M.I.T. and Harvard planning and architectural students, who now and again pursue, under the guidance of their teachers, the paper exercise of converting it into super-blocks and park promenades, wiping away its nonconforming uses, transforming it to an ideal of order and gentility so simple it could be 9 engraved on the head of a pin.

North End 也因而被反复作为麻省理工学院和哈佛规划建筑专业学生的作业，在老师的指导下，学生们坚持不懈地在纸上把它变得拥有车辆禁行区和公园散步场所，去除其不适宜的用途，把它转变成一个秩序井然和优雅高尚的理想典范，做起来好象简单得微不足道。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。