好词典
teeth
UK /tiːθ/US /tiːθ/
词源
源自古英语 'tōþ'（单数）和 'tēþ'（复数），与德语 'Zahn' 和荷兰语 'tand' 同源，最终源自原始印欧语词根 '*dent-'，意为牙齿。
noun
❶ 牙齿，指人或动物口腔中用于咀嚼食物的坚硬结构，通常排列在上下颌骨上。
“She brushed her teeth before going to bed.”
（她睡前刷了牙。）
“The dentist checked my teeth and found no cavities.”
（牙医检查了我的牙齿，没有发现蛀牙。）
❶ （工具或机械的）齿状部分，如齿轮的齿或梳子的齿。
“The teeth of the gear were worn out and needed replacement.”
（齿轮的齿磨损严重，需要更换。）
“A fine-tooth comb has closely spaced teeth.”
（细齿梳的齿排列得很紧密。）
同义词:dentition, fangs, molars, incisors, pegs
常见短语
by the skin of one's teeth — 勉强成功或逃脱，形容情况非常惊险或接近失败。
“He passed the exam by the skin of his teeth.”
（他勉强通过了考试。）
armed to the teeth — 全副武装，形容携带大量武器或装备。
“The soldiers were armed to the teeth for the mission.”
（士兵们为任务全副武装。）
get one's teeth into something — 专注于某事或开始认真处理一项任务。
“She finally got her teeth into the new project.”
（她终于开始认真投入新项目。）