阻断

To investigate whether the expression of cdc2 and cyclin B1 in spermatogenic cells during spermatogenesis is actually a temperature dependent event, in situ hybridization, Western blotting and immunohistochemistry analysis were used to study the expression of cdc2 and cyclin B1 in normal and cryptorchid testis. Results showed that heat would differentially hurt male germ cells in different developmental stages during spermatogenesis, especially the pachytene primary spermatocytes. Most of spermatogonia in contralateral cryptorchid testis were not harmed fatally by heat as yet, indicating that spermatogonia could resist to beat to a certain extent. In this case spermatogonia could develop to pachytene/diplotene primary spermatocytes, but they could not acquire the ability to complete the transition from mitosis to meiosis, and then appeared to go through apoptosis. Therefore, we could not find the descendants of meiosis: secondary spermatocytes and round spermatids, elongated spermatids and spermatozoon. The abdominal temperature had no significant influence on the transcription of cdc2 and cyclin B1 in the spermatogonia and pachytene/diplotene primary spermatocytes. In normal rabbit testis, cyclin B1 increased in the pachytene/diplotene primary spermatocytes before meiosis and reached its peak in the spermatids.

为了解精子正常发生过程中cdc2和cyclin B1表达的低温依赖性，我们利用原位杂交和免疫组化等方法，研究了正常和隐睾精子发生过程中cdc2和cyclin B1的转录和翻译调控活动，结果表明：（1）热对各阶段的雄性生殖细胞都有损害，粗线期的初级精母细胞尤为敏感，实验性隐睾内的精原细胞尚未完全受到"致命"影响，说明精原细胞对热有一定的耐受性，但即使成为粗线期／双线期初级精母细胞，却未能获得由有丝分裂过渡到减数分裂的能力，呈现不同程度的凋亡，所以在整个切片中找不到源自减数分裂的产物----次级精母细胞、圆形精子细胞，更谈不上长形精子细胞和精子的形成；（2）腹腔高温未明显地影响隐睾精原细胞和粗线期/双线期初级精母细胞中cyclinB1和cdc2的转录，说明高温并不是通过影响cyclin B1和cdc2的转录活动而导致生精过程阻断的；（3）正常兔睾丸组织中，〓在精原细胞和粗线期／双线期精母细胞中均有表达：cyclin B1蛋白在减数分裂前期的粗线期／双线期初级精母细胞中的表达量增加，于变态末期的精子细胞中达高峰。

Six days after inoculation, the cucumber root tip was slightly swollen and symmetrical root-knots were observed at the meristematic and elongation zones. Giant cells were differentiated by previous cambium cells in the center of the root; 10days after inoculation, symmetrical and secondary root-knots were observed at the root hair and upper zones. Vessels were separated by giant cells, around which protoxylem vessels were observed; l6days after inoculation, hypo-vascular tissue appeared earlier than normal; 20-30 days after inoculation, the vertical arrangement of vessels was disordered, shape was distorted and a new vascular tissue appeared in the cortex.

结果显示：接种后6 d的根尖分生区、伸长区出现膨大、对称的根结，根中心的原形成层细胞分化出巨型细胞；10 d在根毛区及以上部位出现既有对称又有偏于一侧的根结，周围有原生木质部导管出现，根结中巨型细胞阻断了导管；16 d次生维管组织提早出现；20~30 d导管纵向排列无序，形状扭曲，皮层中有新维管组织产生。

If enacted, this legislation would call for a coordinated effort from the Centers for Disease Control and Prevention, the National Institutes of Health and, the Indian Health Service to curb present trends in minority communities.

如果立法提案制定成为法律，这项议案将呼吁疾病控制与预防中心、国家健康研究所，印度健康服务所等机构合力阻断美国少数民族现在的病况。

a cyanotype mi the gua fasten h2 is stop by body, have a strong nti- sour secrete a function.this text elaborateds its toxicity reaction from 8, though has many poison side effect, still don't lose to one safety stronger medicine, clinical with extensive application, want ～only full understanding, attention observation, ability decrease poison side effect reaction of occurrence.

甲氰咪胍系h2受体阻断剂，有强大的抗酸分泌作用。本文从八个方面阐述了其毒性反应，尽管有诸多毒副作用，仍不失为一安全性较强的药物，临床以广泛应用，只要充分了解，注意观察，能减少毒副作用反应的发生。

Exogenous E2 alone has no effect on cell viability and apoptosis of H9C2 cells, but it can decrease the sensitivity of H9C2 cells to H_2O_2,hence,protect cells against apoptosis caused by oxidative stress.2Exogenous E_2 has downregulation effect on TβRⅠand TβRⅡof H9c2 cells,blocking ER may delete this effect of estradiol.H9c2 cells express ERβonly,suggests that E_2 may exert modulating effect on TGF-βpathway through ERβ.

外源性E2本身并不能影响H9c2细胞凋亡，但能够降低H9c2细胞对H_2O_2的敏感性，保护细胞抵抗氧化应激引起的凋亡。2外源性E2对H9c2细胞的TβRⅠ以及TβRⅡ具有下调作用，阻断ER可消除E2对TβRⅠ和TβRⅡ的下调作用；E2可进一步通过TGF-β通路降低受体后磷酸化smad2/3的水平；H9c2细胞仅表达ERβ，提示E2可能是通过ERβ发挥其对TGF-β通路的调控作用。

We also studied protective mechanism to liver graft by hepatic denervation and eliminating kupffer cells.

我们认为阻断肝脏交感神经和抑制枯否细胞能明显减轻移植肝的缺血再灌注损伤，从而减少移植肝无功能和功能不全的发生。

Observed the effect of renal sympathetic nerve activity in depressor reflex induced by phenvlcphrine by intravenous injection, after anesthetized rats were injected vasopressln antagonist OPC-2 1 268 in lateral ventricle, inquire into centre regulatory function of vasopressin in baroie flex.This experiments was performed on male Wistar rats weighting 280?

然而，在中枢对压力感受性反射的调制作用却有不同的提法在实验观察麻醉大鼠侧脑室注射血管升压素受体1阻断剂OPC-21268对静脉注射苯肾上腺素诱发的减压反射中所表现的肾交感神经放电活动的影响，探讨血管升压素在压力感受性反射的中枢调节作用。

A dose wasconsidered successful if a sensory block to cold was achievedbilaterally at the T12 dermatome within 20 min and surgery proceededwithout supplementation for at least 50 min.

如果一个剂量可以在20分钟内使病人 T12水平两侧的皮肤冷感觉阻断，且能够至少维持50分钟内不追加药物并确保手术的进行，这一剂量就认定为有效。

An occluder around the left anterior descending arteryallowed induction of a reversible LAD-ischemia.

左前降支脉周围的阻断可诱发可逆性的 LAD 缺血。

Perhaps our boat of dream has not driven into the affection the sea, has the possibility which blocks, even by heartless reaching a deadlock, life hard and dangerous grieved, we will encounter from various aspects taunt, desolately, will loathe, but will do for the world in the most high-quality animal, we will be the vivid people, my gate will have the nimble and resourceful thought that we cannot but therefore the spiritual atrophy will be dispirited.

我们的梦想之舟也许还未驶入深情的大海，就有被阻断的可能，甚至被无情的搁浅，生活艰险酸楚，我们会遭到来自各方面的嘲讽、冷落，鄙弃，但是做为世界上最高级的动物，我们是有血有肉的人，我门有灵动的的思想，我们不能因此而精神萎缩不振。

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。