英语语法分析

Objective To study the influence of excision of sacrum through the superior and inferior margins of the 1st to 3rd posterior sacral foramina on area of sacroiliac joint surface.

目的研究经第1~3骶后孔上、下缘水平切除骶骨对骶髂关节面面积的影响。

Because of the penetrative foramina of the soleplate incorporated the movable door with the open framework, it is very convenient to close the penetrative foramina of the soleplate.

由于床板上的贯穿孔结合活动门，活动门有开启机构，不但能封闭床板上的贯穿孔，而且操作方便。