1
a [adj] tooth
He has a loose tooth.
他有一颗松动的牙齿。
牙齿
先理解核心含义，再看它在真实句子里的用法。
牙齿
One of the hard white structures in the mouth that are used for biting and chewing.
He has a loose tooth.
他有一颗松动的牙齿。
许多脊椎动物口腔中存在的坚硬钙质结构,通常用于咬合和咀嚼食物。
A hard, calcareous structure present in the mouth of many vertebrate animals, generally used for biting and chewing food.
脊椎动物颌部的硬骨状结构,用于咬合和咀嚼或攻击和防御
hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense
锯或类似工具上的锋利凸起。
A sharp projection on the blade of a saw or similar implement.
类似动物牙齿的东西
something resembling the tooth of an animal
I need to see the dentist because my tooth has been aching all week.
我需要去看牙医，因为我的牙已经疼了一整周。
Brush your teeth thoroughly before going to bed.
睡觉前要彻底刷牙。
She has straight white teeth.
她有一口整齐洁白的牙齿。
He has a loose tooth.
他有一颗松动的牙齿。
teeth是tooth的复数形式。
You should brush your teeth twice a day.
你应该每天刷两次牙。
这是一个固定短语，不可拆分。
My daughter has a sweet tooth.
我女儿爱吃甜食。
Not this
I have two tooth.
Use this
I have two teeth.
牙齿 tooth 的复数形式是 teeth，而不是 tooth。因为 tooth 是可数名词，复数形式不规则。
Not this
I have a cavity on my tooth.
Use this
I have a cavity in my tooth.
表达牙齿上的问题通常用介词 in 而不用 on，因为 cavity 是牙齿内部的洞，所以用 in。
刷牙
You should brush your teeth twice a day.
你应该每天刷牙两次。
蛀牙
Eating too much sugar can cause tooth decay.
吃太多糖会导致蛀牙。
牙痛
I have a terrible toothache and need to see a dentist.
我牙痛得厉害，需要看牙医。
掉牙
My little brother lost a tooth yesterday.
我弟弟昨天掉了一颗牙。
假牙
My grandfather wears false teeth.
我爷爷戴假牙。
智齿
Her wisdom tooth is causing her a lot of pain.
她的智齿让她很疼。
竭尽全力地斗争
She fought tooth and nail to win the election.
她竭尽全力地争取赢得选举。
年纪大
He is a bit long in the tooth for that role.
他演那个角色年纪有点大了。
初次接触（某领域）
He cut his teeth on journalism at a small newspaper.
他在一家小报社初次接触新闻工作。
以眼还眼，以牙还牙。
The principle of 'an eye for an eye, a tooth for a tooth' is often debated in legal ethics.
'以眼还眼，以牙还牙'的原则在法律伦理学中经常被讨论。
发长 /uː/ 音 (如 food, boot)
Use tooth naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
发音近似“吐丝”，想象蚕宝宝用牙齿咬桑叶吐丝，加深对“牙齿”的记忆。
中性；常见于日常、医学及解剖语境。
注意：复数形式为teeth
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.
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