unmendable detail 不可修理
He shouldn't try to mend the unmendable.
他不应该试图修补不可修补的东西。
There are some deficiencies in 3D lettering design by means of UG only, such as low efficiency, low success rate, undefined lettering position and pose and unmendable height or depth dynamically.
说明了利用UG本身的功能在进行三维刻字设计时，存在设计效率和刻字成功率低、刻字位置与姿态难以确定、刻字高度与深度无法动态编辑等缺陷；
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