查询词典 prevent changes

Materials and Methods: Forty Sprague-Dawley rats were randomly divided into normal group, control operative group and operative group which includes 6 subgroups (1,3,7,14,21,28 days). The spinal cord hemisection injury model was made by cutting the posterior right side spinal cord. Function changes in the right posterior limb were evaluated by BBB method. The general morphology changes were observed by HE stain.

材料与方法：40只成年SD大鼠随机分为正常组，假手术组和手术组，手术组又分成1，3，7，14，21，28天组，选取制作脊髓右侧半横断损伤模型，BBB法进行右下肢功能评分，HE染色观察损伤脊髓不同时段的大体形态学变化，原位杂交法观察slit-2 mRNA的表达变化，计算阳性细胞灰度值，进行统计学分析。

The significance and the expression changes of slit-2 during the spinal cord injury of rats Objective: To investigate the ethology, morphology and the expression of axon guidance cue slit-2 mRNA changes in different phases of spinal cord hemisection injury, and to explore the effect of slit-2 in axon regeneration of the mammalian central nervous system injury.

目的：观察大鼠脊髓损伤后行为学及形态学的变化特点，同时研究轴突导向因子slit-2的表达变化及意义，进一步探讨slit-2在成年哺乳动物脊髓损伤修复和神经再生中的作用，为临床研究神经系统疾病及其治疗提供新的思路和理论指导。

Often a history of hepatitis or liver cirrhosis, serum alpha-fetoprotein-positive, first have hepatomegaly, jaundice in the late, abdominal pain not due to changes in body position changes, ultrasonography and radionuclide scans can be found in the liver lesions.

常有肝炎或肝硬化病史、血清甲胎蛋白阳性，先有肝肿大，黄疸在后期出现，腹痛不因体位改变而变化，超声和放射性核素扫描可发现肝占位性病变。

If everything changes, does it matter whether it changes a lot or a little (Heraclitus seems to argue that it doesn't matter)?

如果万物皆在变化，那么细微的改变和明显的改变有什么不同？

Elevated CO_2 not only affects the growth and development of plants,but cause changes in the structure and contents of their chemical components that resulted in the changes of the growth and development of herbivore insects fed on plant.

CO2浓度升高不但影响植物的生长发育，而且还改变植物体内的化学成分的组成与含量，从而间接地影响到植食性昆虫，并进而通过食物链影响到以之为食的天敌。

Epigenetics investigates heritable changes in gene expression that occur without changes in DNA sequence.

表观遗传学研究在基因表达中的可遗传的改变，而在DNA序列上没有变化。

As the basement to integrate multi-scale spatiotemporal data, the object evolution model can retain the characteristic of the data with different temporal-scale or different spatial-scale, and reflect the temporal changes especially the heteromorphic changes, and the causalities within the evolving process.

本文通过对时空对象变化过程的分析，指出对象进化的结果不仅是特征的变化，还包括机制的变化，其直接动力是对象行为，其根本原因是其内在机制，时空事件起着对象间信息通道的作用，据此提出对象进化模型，该模型可作为多尺度时空数据集成的结构性基础，在反映时空现象的演变过程，特别是异构演变过程，以及在这个过程中产生的因果关系的同时，还可以保留时空数据的不同时间尺度和空间尺度特点，从而达到增加时空数据库的信息量的目的。

Previous findings from our laboratory have demonstrated that simulated weightlessness may result in atrophic changes with depressed vasoconstrictor responsiveness in hindquarter vessels, and hypertrophic changes with enhanced vasoconstrictor responsiveness in cerebral arteries of rats.

动物实验结果已证实，模拟失重可使大鼠不同部位动脉血管发生差异性改变：后身动脉血管发生萎缩性改变和收缩反应性降低；而脑部血管则发生肥厚性改变和收缩反应性增强。

We argue that the changes in meroplankton abundance, coincident with increased phytoplankton and declining holoplankton, reflect the synchronous effect of rising SST and related changes in the pelagic community on the reproduction and recruitment of many benthic marine invertebrates.

我们推断季节性浮游生物丰度的变化与浮游植物的增长和终生浮游生物的减少是保持一致的，是海水表面温度上升的反映，并与许多远洋底栖无脊椎动物的生殖生长相关。

Rat model of cryopreserved aortic and pulmonary valved homograft heterotopic transplantation was established to observe the changes of humoral and cellular immunological response and pathological changes of implanted homografts.

方 法 通过低温保存的大鼠同种异体带瓣主动脉和肺动脉异位移植的动物模型，观察同种移植后宿主体液和细胞免疫指标的变化，以及移植物的病理改变。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。