反转

The research is very significant to realize the evolution of retrovirus and the mechanism of its infection.

本研究弥补了国内此方面的空白，对反转录病毒感染的机制及其进化等方面的认识有着极其重要的意义。

Gene trap elements are also used in the construction of retrovirus vectors.

基因诱捕技术也被运用了反转录病毒载体的构建。

Gene trap elements are also used in the construction of retrovirus vectors.

基因诱捕技术也被运用于反转录病毒载体的构建。

The HSV-tk/ACV system mediated by retrovirus was safe for the treatment of brain tumors.

反转录病毒介导的HSV-tk/ACV系统在动物体内取得了安全的结果。

As a downstream piping system when the valve opens, reflux valve, when closed, the main medium used to prevent backflow to prevent the pump and drive motor reversal, as well as a container medium discharge; currently the most commonly used is the valve flap around the body Swing Pin rotation flap valve and the valve body along the vertical axis to move lift check valve, but the above two kinds of structures exist in the valve closed, medium speed back quickly from the largest drop to zero, inlet side of the pipe resulted in the rapid pressure rise, resulting Proportional Pressure Reducing Valves in damaging effects on the piping system of water hammer phenomenon, it is generally a diameter of valve production of 50 ~ 500 mm.

止回阀作为管道系统顺流时开启，逆流时关闭的阀门，主要用于防止介质倒流，防止泵及驱动电机反转以及容器内介质泄放；目前使用最普遍的是阀瓣围绕阀体销轴旋转的旋启式止回阀和阀瓣沿着阀体垂直中心线移动的升降式止回阀，但以上2种结构的阀门均存在关闭时介质倒流速度从最大迅速降为零，致使管道进水管一侧内压迅速升高，从而产生对管路系统有破坏作用的水锤现象，所以一般止回阀生产口径为50～500 mm。

CTAB was used to pyrolyse plant cell and reacted with the released cell nucleic acid to form nucleic acid-CTAB complex,the cell extract was then deproteined with chloroform-isoamylol,at last RNA was selectively precipitated by LiCl.

但是一般高等植物组织内都含有多糖类物质，这些物质的存在严重影响RNA的提取，如果去除不净，将影响反转录、扩增等下游操作。

The EIAV proviral genomic long-terminal repeat is a eukaryotic promotor, which plays an important regulatory role on transcription and replication of the virus.

反转录病毒前病毒基因组长末端重复序列对病毒复制有重要的调控作用，影响到病毒的繁殖动力学、组织嗜性、致病力等方面。

The EIAV proviral genomic long-terminal repeat is a eukaryotic promotor, which plays an important regulatory role on transcription and replication of the virus.

反转录病毒前病毒基因组长末端重复序列对病毒复制有重要的调控作用，影响到病毒的复制动力学、细胞嗜性、致病力等方面。

Dynamics theory of ferroelectric polarons, which was developed from the shielding theory of ferroelectricity, is used to explain the polarization switch of ferroelectricity.

在铁电屏蔽理论的基础上发展铁电极化子动力学理论，用来解释铁电体的极化反转现象。

A post-mortem examination showed she had a form of lung cancer called Jaagsiekte that is a fairly common disease of sheep and is caused by the retrovirus JSRV.

死后解剖显示她得了一种名为Jaagsiekte的肺癌，在羊中很常见的疾病，由反转录病毒JSRV引发。

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。