... 补牙 fill a tooth 补牙材料 filling material 补白 filler ...
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to fill a tooth 补牙
But, now there is a hole in my mouth. It will fill up later. Do you know how? A new tooth will take its place!
但是，我的嘴里却有一个洞。它以后会自己填上。你知道怎么填吗？一颗新牙齿会取代它！
youdao
In those days, dentists knew how to fill a tooth.
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