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(1)牙(齒)(one of the set of hard white things like bones that grow in one's jaw and are used for biting and chewing)[C]：clean (brush) one's teeth 刷牙;fill a～補牙;have all one's own teeth 牙齒全部完好無缺;have a～out/pulled 拔牙/拔牙;cut one's teeth (teeth/a～) 牙齒剛透出齒齦長出;

(2)齒狀部分(sth that looks or acts like a tooth)：the teeth of a comb/a saw/a cogwheel 梳子/鋸/齒輪的齒;

(3)有效的力量(strength and power)(常用pl)：These laws have teeth. 這些法律具有威力。a law with teeth to it 有威力的法律;

be/get long in the tooth 年紀大：I'm getting a bit long in the～to climb the mountain. 我已經(jīng)年紀大了，爬不了那座山了。

fight tooth and nail 猛烈、堅毅地戰(zhàn)斗：We fought～and nail but lost. 我們頑強地戰(zhàn)斗，但還是失敗了。

get one's teeth into sth 埋頭于，認真處理：get one's teeth into the job 全力以赴地去工作;

in the teeth of sth 不顧，迎著：in the teeth of public opinion/opposition 不顧公眾的意見/反對;walk (advance) in the teeth of the wind/the gale 頂著風(fēng)/大風(fēng)向前走(前進);

show one's teeth 威脅;發(fā)怒：The government showed its teeth to the rebels. 政府威脅反叛者。

→′toothed adj 有(裝)齒的;′toothless adj 無牙(齒)的;′toothy adj 露齒的，多齒的;′toothily adv 露齒地，多齒地;′toothache n 牙痛;′toothbrush n 牙刷;′toothpaste n 牙膏;′tooth-powder n 牙粉;′toothpick n 牙簽;′toothsome adj 可口的;′tooth-wash n 刷牙水