In geometry optics basic content is asks the picture, the paper through to the physical image position relations analysis, obtains the fast judgment lens image formationrule the method.
几何光学中的一个基本内容是求像，本文通过对物像位置关系的分析，得出快速判断透镜成像规律的方法。
2
According to the characteristics of athletics and the formationrule of its basic skills, we can understand Wushu athletes' psychological changes, thus take some effective teaching measures.
根据运动的特点及技能形成的规律，可以了解武术运动员的心理变化，从而采取有效的教学措施。
3
And Dr Lovis and his colleagues note that "the physics of planet formation is so diverse and complex that we do not expect any universal rule on planet ordering to exist."