绘本推荐atoothfairystory牙仙的故事
idiom of the day 地道表达08sweet tooth表达"某人特爱吃甜点.
local anaesthetic局部麻醉tooth cavity龋洞dental filling补牙side
鲁教版七年级英语上册unit5 section a 1a-2cppt
补牙(filling for a cavity) 4. x光(x-rays) 5.
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