tooth n. (pl. teeth) 1.牙齒。 2.齒狀突出,輪齒,鋸齒,耙齒(等)。 3.嗜好。 4.〔常 pl.〕(像牙齒那樣能咬人的)威力,猛力,(正面)迎擊。 5.〔??凇?〔pl.〕船上的大炮。 a canine tooth 犬齒。 a false [an artificial] tooth 假牙。 a milk tooth 乳牙。 a molar tooth 臼齒。 a wisdom tooth智齒。 I have a sweet tooth . 我喜歡吃甜東西。 the tooth of the wind 風(fēng)的威力。 armed to the teeth 武裝到牙齒,全副武裝。 between the teeth 低聲地。 cast [throw] sth. in sb.'s teeth (引用某事)遣責(zé)某人。 clench one's teeth=set one's teeth. cut a tooth 出牙齒。 cut one's wisdom teeth (eyeteeth) 開(kāi)始懂事。 draw [pull] sb.'s teeth 消除某人不平[煩惱]的根由;拔除某人的爪牙(使無(wú)能為害)。 escape by [with] the skin of one's teeth 〔口語(yǔ)〕幸免于難。 from one's teeth=from the teeth outwards [forwards] 懷恨在心地,無(wú)誠(chéng)意的。 grind one's teeth 咬牙切齒;生悶氣。 have a great tooth for (fruit) 很愛(ài)吃(水果)。 in spite of sb.'s teeth 不顧某人反對(duì)。 in the teeth 反抗;公然。 in the teeth of 不管,不顧;冒著…;正面受著…。 long in the tooth 年紀(jì)大 (She is a bit long in the tooth to play the part of a young girl. 她扮演少女的角色年齡太大了一點(diǎn))。 lose a handful of teeth 〔美拳擊〕下巴受猛擊。 put teeth in [into] a new law 給與新法律的強(qiáng)制性威力。 set one's teeth 咬緊牙關(guān),拼命忍耐。 set sb.'s tooth on edge 使牙齒發(fā)酥[發(fā)澀],使膩煩[惱怒]。 show one's teeth 張牙露齒,怒視,威嚇。 to sb.'s teeth 當(dāng)面,大膽地。 tooth and nail 拼命(戰(zhàn)斗、反對(duì)等)(They fought tooth and nail but lost. 他們竭盡全力拼搏,結(jié)果還是輸了)。 vt. 使具齒狀;給…裝牙齒;刻齒,銼齒(在鋸條上等);(用牙齒)咬(住)。 vi. (齒輪等)咬合。 n. -ful 〔俚語(yǔ)〕(白蘭地酒等的)一滴,一點(diǎn)點(diǎn),一小口。 adj. -less 沒(méi)有牙齒的;無(wú)力的。
Such versatile adult dental stem cells would certainly speed efforts to generate teeth on scaffolds, and they might also facilitate the tooth-engineering approach used by the sharpe group at king's college london 這些多功能的成年牙齒干細(xì)胞,勢(shì)必可加速利用支架來(lái)制造牙齒的工作,而且也可能促成了英國(guó)倫敦國(guó)王學(xué)院夏普?qǐng)F(tuán)隊(duì)所進(jìn)行的牙齒工程研究。
5 ) using the practical products, we have done experiments and comparisons on designing and generating tooth, testing the contact ratio, tooth root stress, vibration and noise for the high contact ratio spiral bevel gears 摘要5)采用實(shí)驗(yàn)研究技術(shù),結(jié)合實(shí)際產(chǎn)品,進(jìn)行了高重合度弧齒錐齒輪的設(shè)計(jì)、切齒、重合度測(cè)試、齒根應(yīng)力測(cè)量、振動(dòng)和噪聲測(cè)量等大量對(duì)比實(shí)驗(yàn)。
Abstract : in order to solve the double parameters enveloped in the geartooth flank generating, the complicated double parameter envelope is simplified to the generating process between work-piece and imaginary crown generating gear by means of mathematical transformation . the equation of the imaginary crown generating surface and the partial derivatives are deduced, so the differential geometric parameters of the generating surface can be obtained . by analyzing the generating motion between the imaginary crown generating gear and the work-piece, all the first to third order geometric parameters of the generated tooth flank at any given point can be calculated 文摘:為了解決直接求解展成法加工中存在的復(fù)雜雙參數(shù)包絡(luò)問(wèn)題時(shí)的困難,提出通過(guò)數(shù)學(xué)變換,將此包絡(luò)問(wèn)題轉(zhuǎn)化為假想平面產(chǎn)形輪與工件之間的展成問(wèn)題來(lái)進(jìn)行研究.推導(dǎo)了假想產(chǎn)形面的方程和各階偏導(dǎo)矢,于是可獲得產(chǎn)形面的微分幾何參數(shù).通過(guò)分析假想平面產(chǎn)形輪與工件之間的展成運(yùn)動(dòng),即可得到被展成齒面上任意指定點(diǎn)的全部一至三階微分幾何參數(shù)