[ 'tetræd ] n. 1.四个；四个一组的东西。 2.【生物学】四合子，四分体。 3.【化学】四价元素。 4.【几】拼四小组。 adj. -ic
Example Sentences:
1.
The tetrads eventually shrivel or are resorbed . 这种四分体最终萎缩或被再吸收。
2.
At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad 此时每条染色体由一对染色单体构成，这两条联合的染色体称为四分体。
3.
The guests have more priority in our hotel than in other three - star hotels . the hotel has 375 rooms . among them , there are 15 tuites , 228 standard rooms , 30 singles , 15 sriple rooms and 10 tetrad rooms 其中套间15间，标准间228间，单人间30间，三人间15间，四人间10间，普通两人房54间。
4.
In order to recognize presumptive sidechain interactions , the purpose of the statistical analysis is to find frequently occurring common parts of amino acid polyads , including diads , triads , tetrads and 这种共振效应可推论到酶催化的机制，蛋白质的构象被认为是处在每秒109次的涨落状态之中
5.
It was thought in the past that it was a significant part of the so - called “ narcoleptic tetrad ” , but recent surveys of non - clinical populations , such as ours , suggest that the prevalence may be as high among the general population as among diagnosed narcoleptics 在过去它常被认为是嗜睡症的重要临床症状，但最新的关于非临床人群的调查表明，正常人群中患有睡眠瘫痪症的比例与确诊嗜睡症人群中的比例相当。
6.
3 . the development of the anther wall follows the basic type . cytokinesis in the microspore mother cell is of the successive type . the arrangement of microspore in tetrad is tetrahedral . mature pollen grain is of 2 - celled type . the anther has 4 four rooms , accidentally seen six or seven rooms 花药壁的发育为基本型，小孢子减数分裂为连续型，小孢子四分体为四面体型，成熟花粉为二细胞型。花药多为四室，偶见六室和七室。 4
7.
Results : there are 20 cases of fchd , in which 2 cases is of endocardial cushion defect , 3 of atrial septa defect , 2 of single atrium , 2 of single ventricle , 2 of double outlet of right ventricle , 2 of ebstein ' s malformation , 5 of interventricular septal defect , 2 of fallot ' s tetrad . 16 cases were diagnosed by ultrasonography and 4 cases were missed diagnosis in prenatal 结果：发现20例胎儿有先天性心脏缺陷，其中完全性心内膜垫缺损2例，原发孔性房间隔缺损3例，单心房、单心室、右室双出口、三尖瓣下移畸形各2例，室间隔缺损5例，法乐四联症2例。
8.
Strong negative 8 eu shows the granites are high evolved granite . ( 6 ) the tetrad effect of ree and the obvious fractionation between k - rb , y - ho , zr - hf , nb - ta , and sr - eu in the dajishan granites indicate that , the aqueous fluid pays an important role in the evolution of the granites , as well as indicate that there exist enough interaction between peraluminous melt and aqueous magmatic fluid . furthermore the fluorine played a very important role in this process ( 6 )大吉山花岗岩类稀士元素具有“四重效应”配分的特点以及微量元素对kjrb 、 y / ho 、 zr舰f以及nb / ta发生明显分异，暗示在花岗岩岩浆的演化过程中，经历了充分的流体一熔体作用，同时分异出大量富含f 、 w等矿化剂元素和成矿元素的热液流体，致使钨矿的形成。
