... fossa retromolaris 释义：磨牙后窝 second deciduous molar 释义：第二乳磨牙 elevator for deeply seated molar stumps 释义：深部磨牙残根用(牙)根挺 ...
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It's very important to make a space maintainer if the second deciduous molar is lost too soon.
假如第二颗乳牙过早脱落，那摸装上间隙保持器是件要紧的事。
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