He's got a front tooth missing.
他有一颗门牙掉了。
Another has a single front tooth.
另外一位门牙只有一颗。
To have one upper front tooth pulled out?
被拔掉一个上颚前门牙？
One would say, oh, it's just a small front tooth.
有人可能会说：那只不过是一个小小的前牙。
I chipped the enamel on my front tooth when I fell over.
我跌倒时门牙的珐琅质碰碎了。
Last week my six year old, Pierson, came home with his front tooth missing.
上个星期，我六岁的儿子皮尔逊从学校回来，少了一颗门牙。
Objective: to explore an ideal method to restore single front missing tooth.
目的：探索一种较理想地修复单个前牙缺失的方法。
The top front teeth are the ones which are most at risk from tooth decay.
上门齿是最容易受到腐蚀的牙齿。
The top front teeth are the ones which are most at risk from tooth decay.
上门齿是最容易受到腐蚀的牙齿。
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