tetrad

英

美

网络  四分体; 四联球菌; 四联体; 四分子; 四分孢子

复数：tetrads　

计算机

英英释义

noun

• the cardinal number that is the sum of three and one
  Synonym:four4IVquaternquaternionquaternaryquaternityquartetquadrupletfoursomeLittle Joe

双语例句

• First, we construct the symmetrized null tetrad from which the spin coefficients and Dirac equation are derived.
  首先，构造对称化零标架，计算旋系数，导出Dirac方程，并对其进行化简。
• 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。
• It appears however that the formation of megaspore tetrad associated with the high GA3/ ZT ratio.
  高水平的ZT/IAA有利于大孢子母细胞和花粉粒的形成，而大孢子四分体的形成则需要高的GA3/ZT比值。
• Our main results were as follows: the ovary of male I degenerated and disappeared quickly upon megaspore tetrad degeneration, and developed into macrosporocytes;
  结果发现：色木槭一期雄花（雄I）在大孢子四分体退化形成功能性大孢子时期，子房萎缩并迅速退化消失；
• This phenomenon occurs in the early tetrad stage.
  这个现象在早期四分体阶段出现。
• The tetrad analysis of some hybrids led the discovery of two complementary genes systems.
  通过四分体分析发现一些杂种有两种互补基因系。
• Microspore mother cells meiosis was conformed to simultaneous type with mostly tetrahedral and decussate tetrad.
  小孢子母细胞减数分裂属于同时型，小孢子在四分体中的排列方式多数为四面体形，少数为十字交叉形。
• Microspore abortion occured after the tetrad formation.
  小孢子败育发生在四分体形成以后。
• The Huangshan A-type granites with tetrad REE: constraints on Mesozoic lithospheric thinning of the southeastern Yangtze craton?
  高度演化的黄山A型花岗岩：对扬子克拉通东南部中生代岩石圈减薄的约束？
• Chromosomes out of nuclei can be seen both at prophase ⅱ and tetrad period.
  前期Ⅱ和四分体时期可观察到核外染色体；