Obama was the ninth president to receive an honorary degree from Notre Dame and sixth sitting president to address graduates. 奥巴马是第九任从圣母大学接受荣誉学位的总统,第六任对毕业生演讲的总统。
Railway Transition Curve of Subjunctive Equation of Ninth Degree 拟九次方铁路缓和曲线
Comparison is conducted between the different seismic effects corresponding to the ninth degree frequent and rare earthquake, respectively. 比较了9度多遇地震和罕遇地震对结构的不同作用效果。