两细胞的

The retina is composed of rods and cones, two different kinds of light-sensitive elements.

视网膜是由棒状的和圆锥状的细胞组成，它们两种不同的感光元素。

Scientists examined one of the creature's thigh bones and noticed unusual features in the marrow cavity.

报道说，研究人员对其它恐龙化石重复了实验，一个是8000万年前鸭嘴龙的化石样本，还有两个6500万年前的暴龙化石样本，结果都得到了类似于现代动物骨胶原的软组织，并可以观察到其中的血管和细胞结构。

McDonaid TF, Trautwein W. The potassium current underlying delayed rectification in cat ventricular muscle［J］. J Physiol, 1978,274:217.［3］ Matsuura H, Ehara T, Imoto Y. An analysis of the delayed outward current in single ventricular cells of the guinea pig［J］. Pflugers Arch, 1987,410:596.［4］ Chinn K.

就模型本身而言还需进一步的完善，最新的研究发现在许多种属的心肌细胞中Ik都有两种成分Ikr与Iks［4～6］，这无疑将使对Ik的理解更全面和完善。

METHOD Two in vitro experiments were performed for comparative study to evaluate the effect of extract, namely, adapting the addition of the contained medicine serum to culture medium and adding extract to the medium directly.

采用两种离体方法对比观察，即以家兔灌服该提取物后获取的含药物血清加至细胞培养基中的血清药理学方法和将提取物直接加至培养基中的直接体外给药法。

But in B and C groups, the TNF-α level increased after transplantation, and the electron micrography showed us that Kupffer became activation.

而B、C两组随着心跳停搏时间的延长，术后TNF-α的水平逐渐增高，电镜下更可见呈激活状态的Kupffer细胞。

He number of TCR V(Vα equal s to 100 and Bβ equals to 30 ) is less than the one of lg Vh (Vh equals to 300),for TCR V is subject to negative selection of major histocompatibility complex according to the neutral theory We discussed that is somatic mutation or DNA rea rrangement the main force in producing antibody diversity and are there pseudoge nes in TCR V or not.

CR V的数目(V α为100，Vβ为30)远少于Ig VH(数目为300)，原因是前者受到主要组织相容性复合体的制约，即受到负选择，这与中性学说观点相一致。文章还讨论了体细胞突变和DNA重排对两类抗体多样性产生上的作用，并探讨了Ig VH和TCR V的假基因问题。关键词分子进化，协同进化，免疫球蛋白，T细胞受体，中性学说

Our results show that the photoreceptor of Cherax quadricarinatus has two kinds retinular cells that have different function.

红螯螯虾的感光系统有两种类型的感光细胞，可能具有不同的生理功能。

Furthermore, treatment of the cultured tobacco cells with ABA also resulted in obvious increase in plasma membrane NADPH oxidase activity, and these enhanced effects of H2O2 production and NADPH oxidase activity induced by ABA were pronouncedly inhibited by two widely used mammalian neutrophil NADPH oxidase inhibitors, diphenylene iodonium and imidazole.

进一步研究发现，ABA能够显著升高质膜NADPH氧化酶的活性，而且ABA诱导H_(来源：A79BC论文网www.abclunwen.com)2O_2和NADPH氧化酶活性增加的效应能够被两个常用的NADPH氧化酶抑制剂碘二苯和咪唑显著抑制，这些结果说明，质膜NADPH氧化酶在悬浮细胞ABA诱导的H_2O_2快速产生中起重要作用。

So EA therapy could decrease the loss of neurons by restraining apoptosis and putrescence of brain neurons, accelerate the functional recover of damaging neurons and improve studying and memory ability.

电针治疗可以通过抑制神经元细胞凋亡和坏死两个途径减少皮质和海马神经元的丢失，促进受损神经元功能的恢复，改善VD模型大鼠的学习记忆障碍。

The result suggests that there be no correlation between the expression of cyc07 and enhanced elongation of rice seminal root under upland condition.

本研究克隆了细胞分裂S期特异基因cyc07，将其定位在第1染色体，同时对其在淹水与旱种条件下水稻根尖中的表达进行了分析，发现cyc07在两种培养条件下的根尖中的表达没有差异，cyc07可能与旱种条件下水稻种子根的伸长无关。

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。