natural class

ooad attempts to find the optimal set of objects and the most natural class hierarchy to implement them.

OOAD试图找到最优的对象和最自然的类继承来实现它们。

The subjects of this study are 32 non-English-major freshmen of one natural class in one Professional College in Zhejiang from China. The teaching experiment lasted four months, totally 16 weeks, from March, 2008 to June, 2008.

并以浙江金融职业学院金融系大学一年级一个自然班32名学生为研究对象，为期四个月（从2008年3月至2008年6月总共16周）的教学改革。

works of german photographer reinhard dirscherl get jose, by virtue of the natural class of single second prize.

德国籍摄影师ReinhardDirscherl凭此作品获得荷赛自然类单幅二等奖。