serious defect

基本解释

It is always a challenge for clinical medical workers to reconstruct the serious defect of the peripheral tissue.
长久以来，周围组织严重缺损的修复一直是个难题。
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Serious tooth defect which involved cuspid, incisal angle, marginal ridge and occlusal surface can't be filled and need occlusal reconstruction.
各种严重的牙体缺损已涉及牙尖、切角、边缘嵴以及合面，需要咬合重建而不能使用一般充填修复者。
This paper presents the serious defect that in control theory. The relative stability of control systems is not only for the traditional definition. The means to solve this problem is discussed.
本文提出在控制理论中对系统相对稳定性的传统定义存在相对稳定性指标不唯一的重要缺陷，并探讨了解决这个问题的途径。