减数

In plants that undergo ALTERNATION OF GENERATIONS, spores are produced by meiosis by the sporophyte generation, so are usually haploid; they germinate to produce the haploid gametophyte generation.

在具有世代交替的植物体中，由孢子体世代进行减数分裂产生孢子，因此多为单倍体。它们将发育为单倍体的配子体世代。

In organisms showing ALTERNATION OF GENERATIONS, the gametes may be produced by mitosis in the haploid generation, or by meiosis in the diploid generation and give rise directly to gametes or gamete-producing cells.

在表现出明显世代交替的生物体中，配子可能是由单倍体世代发生有丝分裂产生，亦可由二倍体世代减数分裂直接产生配子体或配子母细胞。

C-banding and In-situ hybridization analyses of Ag.intermedium,a partiai wheat/Ag.intermedium amphiploid,and six derived chromosome addition lines 《TAG》 Friebe

八倍体小偃麦的形成，减数分裂稳定性和染色体组型的分析《作物学报》管启良 1980 // 03 P 129-137小偃麦新品种与中间类型的选育，程序和方法《作物学报》孙善澄

The karyotypes of four species in Pentatomidae were studied in male germ cells prepared on air dried slides stained with Giemsa.Karyotype analyses using specific software are made for the first time in pentatomid karyotypic study and model karyotype charts are presented.

研究了4种中国蝽科昆虫的核型和染色体的减数分裂行为，并首次在半翅目中采用核型分析软件对第一次减数分裂中期的染色体进行核型分析。

In the course of present investigation in interspecific hybrid of Tritical crops, cytomixis mas observed at microspore stage, the present investigation deals with detailed analysis of this phenomenon at different conditions.

作者在麦类远缘杂种的减数分裂过程中发现，在减数分裂Ⅰ的前期和小孢子时期均存在核穿壁的现象，并对各种状态下的穿壁现象进行了详细的观察研究。

The situation of abnormal development of male cells is as follows:microspore mother cell can't enter into meiosis because of intense vacuolation,shrink and disintegration of its cytoplasm;although vacuolated microspore mother cell can enter into meiosis,it can't form normal dyad and degenerate in the middle process;dyad and tetrad become vacuolated and can't develop normally;cytoplasm of microspore shrinks around the nucleus at the stage of central nucleus microspore,the shape of microspore is twisted into crescent or irregular shape,at last its cytoplasm and nucleus are disintegrated and crescent vacant microspore presents;nutritive substances can't be accumulated at the stage of vacuolated microspore,cytoplasm is disintegrated,and microspore turns into a big vacant pollen.

雄性细胞异常发育有几种情况：小孢子母细胞强烈液泡化，细胞质收缩解体，不能进入减数分裂；小孢子母细胞液泡化，虽能进入减数分裂，但不能形成正常二分体而中途退化；二分体、四分体细胞液泡化，不能进行正常发育；单核小孢子中央期，细胞质收缩包围核，小孢子形状扭曲呈月牙形或不规则形，最终细胞质和核解体而呈月牙形的空壳小孢子；单核液泡期的小孢子不能积聚营养物质，细胞质解体而成为大的空壳花粉粒。

After light radiation time of one hour,the IC50 of cytotoxicity of C60 liposomes is 154.9 μg/ml.During the concentration of C60 liposomes are 16.86 μg/ml and 33.72 μg/ml separately,the plaque reduction rate of direct virucidal activity to HSV-1F strain is positive correlation to the time of light radiation,the correlation coefficients rate 0.8510（P.005） and 0.9766 （P.005） respectively.

光照1 h，C60脂质体对Vero细胞的细胞毒为154.9 μg/ml.C60脂质体浓度为16.86 μg/ml及33.72 μg/ml时，对HSV-1F株直接杀灭的空斑减数率与光照时间成正相关，相关系数r分别为0.8510（P.005）和0.9766（P.005）；当C60脂质体浓度为16.86 μg/ml时，对HSV-1F株感染阻断的空斑减数率与光照时间正相关，相关系数r依次为0.84（P.005）及0.9923（P.005），说明C60的抗病毒作用具有时间效应，主要是光敏动力学机制起作用。

Methods: The physical volume of 24 bicuspids extracted for orthodontic purposes (16 were imaged with the i-CAT and 8 with the CB MercuRay before extraction) was determined using water displacement technique.

选择10例正畸减数病例拔除的双尖牙24颗，采用排水法物理测量其体积(volume of water， Vw)，其中7例（16颗牙齿）在减数前采用i-CAT进行三维扫描，3例（8颗牙齿）使用CB MercuRay。

The events occurring during these stages differ in meiosis and mitosis, notably in that bivalents (pairs of homologous chromosomes) are formed in meiosis, whereas homologous chromosomes remain separate in mitosis.

在减数分裂和有丝分裂中，前期发生的事件是不同的，尤其是二价染色体区别最为明显，在减数分裂中形成，而在有丝分裂中同源染色体是分离的。

The results showed that the varieties and activity of POD isoenzyme expression exist in difference in anther of male sterility line and maintainer in different development stage in sweet pepper and hot pepper. POD isozyme activity of anther was very low in meiosis stage in male sterility line of sweet pepper. There is a POD special band in meiosis and pollen mature stage in male sterility line of pepper respectively.

结果表明不育系与保持系，在花药发育的不同时期POD同工酶表达种类及表达活性之间存在差异，其中甜椒不育系在减数分裂期POD同工酶的活性非常低，辣椒雄性不育系在减数分裂期及花粉成熟期分别多一条POD特征带。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。