jacky
tooth是可数名词；tooth n.牙;齿;齿状部分；复数： teeth；
例句：
When did she cut her first tooth?
她什么时候长出的第一颗牙？
Hes got a front tooth missing.
他有一颗门牙掉了。
扩展资料
Many infants do not cut their first tooth until they are a year old.
很多婴儿到一岁大时才开始长牙。
Cigarette smoke causes oral cancer, gum diseases and tooth loss.
香烟烟导致口头癌症、牙龈炎和牙脱落。
The residents are fighting tooth and nail to stop the new development.
居民为制止新的建房开发计划正在全力以赴进行斗争。
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