This paper discusses a method of selecting the boundary tree in edge finite element method, proposes the matrix rank method and introduces its applications.

介绍了棱边有限元法中选取边界树的原理和方法，提出了矩阵求秩法计算边界树，并结合实例说明其有效性．。

I slide downhill, thwack into the tree that marks the boundary of the next plot.

我滑下山坡，重重地撞在一棵标志着下一块墓地边界的树上。

Their boundary went from Heleph and the large tree in Zaanannim, passing Adami Nekeb and Jabneel to Lakkum and ending at the Jordan.

他们的境界是从希利弗从撒拿音的橡树，从亚大米尼吉和雅比聂，直到拉共，通到约旦河。