产生作用

Methods The pyrogllol auto-oxidation was adopted to produce superoxide anion O(superscript - subscript 2; the system H2O2/Fe(superscript 2+) was used to produce hydroxy radical through Fenton reaction; and spectrophotometry was used to detect the clearing functions of drugs with different concentrations against O(superscript - subscript 2) and OH.

采用邻苯三酚自氧化法产生超氧阴离子自由基O(上标-下标 2，采用H2O2/Fe(上标 2+)体系通过Fenton反应产生羟自由基，用分光光度法分别测定不同浓度的药物对O(上标-下标 2)是和OH的清除作用。

Simulated regression analysis showed that the exponential increase of MDA content, plasmamembrane permeability, auto-oxidation rate of the organ and O2 produc-tion rate and parabolic decrease of SOD activity and GSH content as well as the logarithmic decrease of CAT activity in the stressed leaves were found with the decrease of soil water content....

经回归模拟显示，蔗叶MDA含量、质膜差别透性、O_2产生速率和组织自动氧化速率均随土壤含水量的降低呈指数增加，SOD活性和GSH含量呈抛物线变化，而CAT活性呈对数降低；逐步回归分析定量地指出了水分胁迫下蔗叶SOD和CAT在清除活性氧、防止膜脂过氧化和质膜破坏中的协同作用关系，且受O_2产生的影响；经卡方测验证实，该回归模型各参数与大田干旱胁迫的实际结果相符。

Exhaust brake valve is an auxiliary brake, is a necessary supplement to vehicle service brake; it is to use engine as an air compressor to generate brake torque to decelerate the vehicle; normally it is assembled inside of exhaust pipe, and close the valve to clog the exhaust duct as necessary to reach braking.

排气制动阀是一个辅助制动器，是汽车行车制动器的必要补充，是将发动机作一个空气压缩机使用而产生制动力矩从而对汽车产生减速作用，一般安装在排气管中，在需要减速时关闭阀门以阻塞排气通道而达到制动的效果。

Under compressive stresses, tensional failure will occur in the rock bridge of the end of joint, which leads to connect new cracks of rock bridge with the nearby primary joints.

当节理在压应力作用下所产生的次生裂纹扩展达到相邻节理后，岩体就会产生贯通裂纹而破坏。

Rut formation mechanism and classification of 1 track of the generation mechanism Asphalt Concrete Pavement open traffic after the traffic load under repeated, the formation of track can be divided into three phases:(1) the initial stage of the compaction process: by the RCC, high temperature and in a semi-flowing state of asphalt and asphalt cement with slag was composed of mineral aggregate into between the aggregate at the same time was a strong line up has a certain frame structure.

车辙产生机理及分类 1车辙的产生机理沥青混凝土路面开放交通之后，在行车荷载反复作用下，车辙的形成可分为三个阶段：（1）开始阶段的压密过程：经碾压，高温下处于半流动状态的沥青及沥青与矿粉组成的胶浆被挤进矿料之间，同时集料被强力排成具有一定骨架的结构。

Low pulse before sift network operating principles : the use of double - sieve drum aircraft design; Work, pulp before sift upper tangent pressure the network into; Pulp the filter into the upper body of the dle two filter drum, double tilt-rotor rotary rotors, while the centrifugal force and centripetal forces role, through good mix inside and outside pool in sieve sieve drum body low extremity good mix of outflow; pulse in the tilt-rotor rotary drum filter

低脉冲网前筛工作原理：该机采用双筛鼓设计；工作时，浆料从网前筛上部切线压力送入；浆料从筛体上部流入到两个筛鼓中间，在双旋翼转子旋转时产生的离心力和向心力的同时作用下，良浆通过内、外筛鼓汇集于筛体下端的良浆管流出；脉冲旋翼在旋转时筛鼓不会赌赛，浆渣受转子旋转产生的轴向推动力，向下流送的同时被浓缩并逐步移到排渣口。

Low pulse before sift network operating principles : the use of double - sieve drum aircraft design; Work, pulp before sift upper tangent pressure from the network into; Pulp from the filter into the upper body of the middle two filter drum, double tilt-rotor rotary rotors, while the centrifugal force and centripetal forces role, through good mix inside and outside pool in sieve sieve drum body low extremity good mix of outflow; pulse in the tilt-rotor rotary drum filter

低脉冲网前筛工作原理：该机采用双筛鼓设计；工作时，浆料从网前筛上部切线压力送入；浆料从筛体上部流入到两个筛鼓中间，在双旋翼转子旋转时产生的离心力和向心力的同时作用下，良浆通过内、外筛鼓汇集于筛体下端的良浆管流出；脉冲旋翼在旋转时筛鼓不会赌赛，浆渣受转子旋转产生的轴向推动力，向下流送的同时被浓缩并逐步移到排渣口。

The released species may facilitate and accelerate their detachment and diminish the initial elastic range of bone cement. This may create loosening or shrinking effect on the inserted stem. A conclusion for both behaviors suggest that a variation of relative and dynamic interface in use.

在骨泥与钛金属之长时间微幅运动作用下，骨泥材料受到压力、微幅运动及摩擦热的影响，其表面出现残屑堆积、热软化压平等现象，使得骨泥与钛金属界面产生滑移，进而产生残屑及粗糙度的改变。

Segments produced clusters of somatic embryos from embryogenic calli or directly from root apical meristems , and that also can convert into bud directly in the different tissue culture conditions. Modified media B5 with 1.0 mg.L-1 2,4 - D and 3.0mg.L~1 6-BA is suit to induce calli, and 0.5 mg.L-1 NAA is fit for somatic embryos inducement from calli. 6-BA encreased direct somatic embryogenesis on root tip distinctly,but NAA is retard it. NAA also prolong the time of root-tip convert into bud directly.

在改良B_5(微量元素为原来的1／3)中加入1.0mg.L~(-1)2，4—D和3.0mg.L~(-1)6-BA对离体根尖的愈伤组织诱导较为合适，0.5mg.L~(-1)NAA有利于从愈伤组织上产生体细胞胚；6-BA明显促进离体根尖直接产生类原球茎，而NAA则有阻碍作用；同时NAA的存在也使离体根尖直接成芽的时间延长。

A gluon junction interaction event is likely to produce a topology with exclusive leading mesons from valence quarks.

一个出现胶子弦结作用的事件会产生多个由价夸克产生的领头介子的现象。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷