反转

The best studied CRP in animal viruses is the NC protein of several retroviruses.

动物病毒中研究较多的是反转录病毒的核蛋白。

The best studied CRP in animal viruses is the NC protein of several retroviruses.

在动物病毒中研究较多的是反转录病毒的核蛋白 [1，2 ] 。

The reduction in switchable polarization of ferroelectric thin film is a major problem in ferroelectric memories.

铁电薄膜开关过程中可反转的极化随开关次数而降低，即铁电极化疲劳，这是铁电存储器应用中遇到的一个大问题。

The analysis reveals that intensity appears to fluctuate with a clear, welldefined rhythm.Although the strength of the magnetic field varies irregularly during the short term, there seems to be an inevitable longterm decline preceding each polarity reversal.

因此在四个选项中： A.decline的意思是&拒绝；变小、变弱&，B.intensify的意思是&变得更强烈、加剧&，C.fluctuate的意思是&涨落、波动&；D.reverse的意思是&使反转、倒退、颠倒&，例如：Writing is reversed in a mirror。

Groundbreaking research by two french geophysicists promises to shed some light on the mystery.using 80 metres of deep sea sediment core, they have obtained measurements lots of magneticfield intensity that span 11 polarity reversals and four million years.the analysis reveals that intensity appears to fluctuate with a clear, welldefined rhythm.although the strength of the magnetic field varies irregularly during the short term, there seems to be an inevitable longterm decline preceding each polarity reversal.when the poles flip―a process that takes several hundred thousand years―the magnetic field rapidly regains its strength and the cycle is repeated.

答案为d。这一题目是根据上下文判断词意的题。flip的意思是&快速翻转&，它所在的句子的意思是&当两极互换――这一过程需要上万年的时间――磁场会很快重新恢复它的强度，新的一轮循环又开始了。&因此在四个选项中： a.decline的意思是&拒绝；变小、变弱&，b.intensify的意思是&变得更强烈、加剧&，c.fluctuate的意思是&涨落、波动&；d.reverse的意思是&使反转、倒退、颠倒&，例如：writing is reversed in a mirror。写出来的字在镜子里是颠倒的。d的意思与flip最接近。

The treadmill training of T-group rats were continuously trained for 4~6 weeks at the intensity of about 75% VO2max (18??5～24m／min,gradient of 0°,each motion lasting 50 minutes,twice a day). Detect the content of gastrocnemius MHC mRNA by gastrocnemius reverse transcription polymerase chain reaction,and detect the changes of MHC muscle fiber and its size of cross section area through immunohistochemistry. Meanwhile,apply the electric stimulation to determine the maximal tension of isometric contraction of post-training gastrocnemius.

运动训练组大鼠进行连续4～6wk强度约为75％VO2max(18.5～24m／min，坡度为0°，每次运动50min，每天2次)的跑台训练，反转录聚合酶链式反应腓肠肌MHC mRNA含量，以免疫组化方法检测肌球蛋白肌纤维的改变情况及横截面积的大小，同时运用电刺激观察训练后腓肠肌等长收缩最大张力。

Based on the study of the latent image distribution and Sabatier effect of iodide uniformly distributed emulsions and core-shell emulsion s, a machanism of Sabatier effect was proposed.

通过对核壳乳剂以及均质乳剂潜影分布和sabatier效应的研究，提出了产生Sabatier效应的可能机理：第一次曝光产生的表面潜影吸附了显影剂负离子以后变成空穴捕获中心而在第二次曝光时被漂白造成影像反转；卤化银颗粒上必须同时有足够的表面敏化中心和足够的内部敏化中心，两者应相匹配。

Finally, the application of parameters of the traps (such as trap density, trap level distribution and so on) to study the electrical aging in polymer was discussed. Considering the close relation between space charge and trap in polymer, the space charge distributions of aged LDPE samples with and without FRS were measured.

考虑到聚合物中空间电荷与陷断的密切关系，考察了电老化过程中纯聚乙烯及合自由基清除剂的试样的空间电荷变化规律，并且运用聚合物的能带模型解释了聚乙烯经过直流预压后，在短路过程中空间电荷极性发生反转的原因。

Considering the close relation between space charge and trap in polymer, the space charge distributions of aged LDPE samples with and without FRS were measured. For the first time, the polarity convert of the space charge in prestressed samples during the short circuit time was explained according to the energy band model of the polymer.

考虑到聚合物中空间电荷与陷阱的密切关系，考察了电老化过程中纯聚乙烯及含自由基清除剂的试样的空间电荷变化规律，并且运用聚合物的能带模型解释了聚乙烯经过直流预压后，在短路过程中空间电荷极性发生反转的原因。

Total RNA from Landes goose liver of 16 weeks old was extracted.

从16周龄朗德鹅肝脏组织提取总RNA，采用反转录-多聚酶链式反应方法扩增出1条长约280bp的cDNA片段。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。