A ventricular septal defect is when this lower wall—the ventricular septum— has a gap in it after development.

室间隔缺损就是位于心脏下方的室间隔，在发育之后存在一个缺口。

The long warm rain had done strange things to the herbaceous beds which bordered the walk by the lower wall.

漫长而温暖的雨水对靠近低墙步道的草本植物床造成了奇怪的影响。

I had coasted along the lower wall of the orchard—turned its angle: there was a gate just there, opening into the meadow, between two stone pillars crowned by stone balls.

我沿着果园的下墙滑行——转过它的角度：那里有一扇门，通向草地，在两根石柱之间。