左

In the process of investigation on the torsional effect of quartz crystal, mirror symmetric conservative law is applied to ascertain the connection between the physical characteristics of leftwards spiral crystals and rightwards spiral crystals.

面对工程界对左旋石英晶体压电性质的描述不统一的现状，从晶体螺旋对称的本质出发，应用宇称不变性明确地建立了左、右旋晶体这两种客观实在物质的物理性质之间的联系，给出了建立这种联系的方法，并应用到了左旋石英晶体的三阶压电张量和四阶弹性张量的确定中。

In aneurysm larger than 50% of the left ventricular volume, patch ventriculoplasty is superior to linear closure in maintaining normal left ventricular form and protecting left ventricular function.

左室容积50％的大型室壁瘤，补片成形术在保持左室正常形态和保护左室功能等方面优于直接缝合术。

Against Macclesfield he played Left Midfield, at Wycombe Left attack in a front 3 (and scored a goal for good measure) and against Wigan he was at Left Back.

对阵马格斯菲特他打左前卫，对阵维康比在三前锋的阵型中出任左边锋（攻进了一个意义重大的进球），对阵维甘又打起了左后卫。

Some electrophysiological index were measured, including atrial effective refractory period, rate adaptability, dispersion of AERP, inducibility and duration of induced atrial fibrillation under different basic pacing cycle length (300, 250 and 200 ms). Results: Contrast with control group, the values of AERP at 6 sites were shortened and maladaptation.

将6对双极记录电极分别缝于高位左、右和低位左、右心房外膜以及左、右心耳，采用心脏程序期前刺激法(S1S2)，分别测量基础起搏周长为300、250和200ms时的心房有效不应期、AERP频率适应性、AERP离散度、房颤诱发率及平均持续时间等电生理指标。

Level of hypertensive group HsCRP is remarkable as a result prep above contrasts group, hsCRP level and style quality exceed mark, smoking, blood fat to reach diameter of end of left room diastole to increase mussily, contractive end diameter adds left room, left ventricular diastole is inchoate mitral valve is the biggest blood stream speed and diastole are terminal mitral valve is the biggest.

结果高血压组hsCRP水平显著高于对照组，hsCRP水平和体质量超标、吸烟、血脂紊乱及左室舒张末径增加、左室收缩末径增加、左心室舒张早期二尖瓣最大血流速度和舒张晚期二尖瓣最大血流速度之比异常有关。

Nighty rats were randomly divided into the groups of control, myocardial infarction and doxycycline, which were given orally 48 hours before and 48 hours after MI with 30mg/Kg per day. Protein and mRNA extraction was done on left ventricular samples containing scar and myocardium together. Samples were assayed from 1 day to 4 weeks post-Mi. The activity of MMPs was measured by zymography and collagen amount by the method of chloramine T, the ratio of II III collagen was assessed by immunohistochemical stain. Protein and mRNA of MMP-2, 9, TIMP-1 were determined by Western-Blot and RT-PCR.

分为对照组、心梗组和治疗组(D组，术前两天至术后两天，口服Doxycycline，30mg／kg／天)，分别于术后第一天、术后一周、术后两周、术后四周取心肌组织，采用免疫组化测定胶原含量和Ⅰ／Ⅲ胶原比例，酶谱法测定心梗后MMP-2，9活性蛋白的表达规律，Western Blotting进一步确定酶谱法中所消化条带蛋白的属性，逆转录-聚合链反应法测定心梗后MMP-2，9和TIMP-1的mRNA的变化规律，运用Acuson Sequoia 512超声心动图机分别测定心梗组、治疗组在两周和四周时左室前壁、后壁厚度以及左心室舒张末内径和左室射血分数。

Rank is the precedence of the operator, starting with 1 for addition..rpar is set for operators such as subtraction, which require their right operand to be enclosed in parentheses if it uses an operator of equal precedence.

rank 是运算符的优先级，从1递增。。rpar是为了像减号这样的运算符准备的，当减号遇到左操作数使用一个同优先级的运算符时，需要把这个左操作数用括号括起来，以使左操作数和减号结合起来。

The primary end point was the incidence of atrial fibrillation. The second end points were New York Heart Association cardiac function class, changes in left atrial and left ventricular end-diastolicdiameters, as well as left ventricular ejection fractionmeasured by echocardiography.

主要研究终点为房颤的发生率，次要终点为心功能分级及超声心动图检查指标(左心房内径、左心室舒张末期内径、左心室射血分数)。

The ECG shows evidence of severe left ventricular hypertrophy with prominent precordial voltage, left atrial abnormality, lateral ST-T abnormalities and a somewhat leftward QRS axis (-15 degrees).

心电图显示的证据，严重左室肥厚与突出的心前的电压，左心房异常，横向的ST - T异常和有点左QRS波轴（-15度）。

In the first one , Our experiment team use ethanol liquor as solvent and achieve the process of racemization of dextrorotatory imidazole in sodium hydroxide environment.

四咪唑的原料成本要比左旋咪唑低50%，其临床驱虫效果也要比左旋咪唑小50%。左旋咪唑的疗效是消旋体的两倍，毒性低一半。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。