| 单词 | 龋洞 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔root canal〕A treatment in which diseased tissue from this part of the tooth is removed and the resulting cavity is filled with an inert material.牙根管填充手术：一种治疗术，把牙根管部的不健全组织除去并在剩下的龋洞中填充一种隋性物质美国传统 |
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