Premature babies may be a few months behind in getting their teeth.
通常早产的婴儿可能会晚几个月长牙。
In this paper reasons of premature failure of gear teeth of coal mining machinery are analyzed.
本文分析了煤矿机械齿轮早期断齿的原因。
In this paper reasons of premature failure of gear teeth of coal mining machinery are analyzed.
本文分析了煤矿机械齿轮早期断齿的原因。
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