阻断

However, when surface waters are warm (as during an El Ni?o), they do not allow the colder, deeper currents to upwell and effectively block the flow of life-sustaining nutrients.

可是，如果海面水温较高，深层海水就无法上流，从而大大阻断了这些生命必须营养的正常循环。

It contents with uracil in the same enzyme system,blocks the metabolic link,impeds the synthesis of DNA,and then prohibits the propagation of the cancer cells.

它的结构与肿瘤细胞所必需的代谢结构尿嘧啶相类似，在同一系统酶中互相竞争，阻断代谢环节，阻碍DNA的合成，从而抑制肿瘤细胞的增殖。

Fluorouracil is a kind of popular antimetabolic drug used in clinic. It has the similar structure with Uralic, which is necessary to the cancer cell. It contents with Uralic in the same enzyme system, block the metabolic link, impeds the synthesis of DNA, and then prohibits the propagation of the cancer cells .

5-氟尿嘧啶(5-Fu)是一种在临床上已为人们所熟知的抗瘤谱广，有效率高的抗代谢药物，它的结构与肿瘤细胞代谢所必需的尿嘧啶相类似，在同一系统中互相竞争，阻断代谢环节，阻碍DNA的合成，从而抑制肿瘤细胞的增殖。

In contrast, the Smad7 transgenic animals had an increased incidence of lung carcinogenesis when subjected to urethane treatment.

同时，在Smad7转基因小鼠模型中，乌拉坦诱导的肺癌发生率明显高于对照组，提示在呼吸道上皮细胞中阻断TGF-b信号通路能够促进肺癌的发生发展。

Objective To evaluate the effects of autocrine blockage on T24 urinary bladder cancer cells.

目的 研究阻断自分泌通路对膀胱癌细胞的影响。

Objective To investigate the therapeutic action of synthetic interleukin-1 blockers on uveitis in rats.

目的 观察人工合成的白细胞介素-1(interleukin-1，IL-1)受体阻断剂对大鼠葡萄膜炎的治疗作用。

It can inhibit endothelial cell migration and multiplication to reduce the vascularization of tumors and finally kill tumors.

它可以抑制内皮细胞的增殖和转移，从而降低肿瘤内血管生成，阻断营养通路，达到杀死肿瘤细胞的目的。

It can inhabit endothelial cell migration and multiplication to reduce the vascularization of tumors and finally kill tumors.

它可以抑制内皮细胞的增殖和转移，从而降低肿瘤内血管生成，阻断营养通路，达到杀死肿瘤细胞的目的。

On the other hand, it may represent a direct vasodilator action unrelated to cholinergic blockade

这可能是一种与胆碱能阻断无关的直接血管扩张作用。

It positions a simple vane in the airflow to break up the Venturi effect.

他们在空气通道中加入一个简单的翼来阻断文丘里效应。

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。