n.栋梁；屋脊梁
A ridgepole of a country should not only have excellent studies but also have excellent qualities! 一个栋梁之才不仅要有优异的成绩，还应该有完美的素质！
Now I am a student of Tsinghua, some days later, of course ,we would become the ridgepole of our country! 现在我是清华大学的学生，日后，我也将成为一个中国的栋梁！
