trim boundary meaning in English

修剪边界

So as to deal with this problem , local b - spline surface designing method with complicated trimmed boundary constraints is advanced . for two neighboring surfaces , we first trim a belt along the common boundary and then bridge a b - spline surface between these two trimmed surfaces with a smooth blending . with respect to the comer area comprised of several adjoining surfaces , a rectangular region covering the comer area is obtained by trimming operations at first , and later a local b - spline for filling the rectangular region is completed through interpolation or approximation
在两张相邻的曲面之间，先在其公共边界处裁剪出一个带状区域，然后再采用曲面搭接的方式实现曲面之间的光滑过渡；而在邻接曲面的公共角点处，先在该角点附近区域裁剪出一个矩形拓扑域，然后运用插值或逼近的方法，设计出一张既满足于该区域的边界条件同时又插值或逼近内部采样点的b样条曲面。