Dentistsadvisetheirpatientstobrushandflossregularlytopreventtheirteethfromdecaying.
Hesufferedtormentsfromhisachingteeth.
Hepickedhisteethwithatoothpick.
Themansmiled,revealingperfectwhiteteeth.
Sheclenchedherteethandrefusedtomove.
Parliamentmustgrititsteethandtakeaction.
议会必须痛下决心，采取行动。
Sheclenchedherteethwhenshewasoperatedon.
Thebanditbaredhisteethinaninsolentsmile.
Mybrotherisfretfulbecauseheiscuttinghisteeth.
He’llbegnashinghisteethwhenhehearsthatwelostthecontract.
Thedentististreatingmyteeth.
Someofherteethwereverybadlydecayed.
Theyarecloselyrelatedaslipsandteeth.
他们唇齿相依。
Heusuallyhasacigarvisedinhisteeth.
Bacteriastickstofooddebrisintheteeth,causingdecay.
Theteethonthegearsmeshastheyturnround.
转动时齿轮上的齿与齿相啮合。
Hepickedupaleafletaboutcareoftheteeth.
Histeethwerestainedwithnicotinefromyearsofsmoking.
13deformrootgrooveteethwereobservedwithmacroscopyandmicroscopiy.