易发生变化的

With good fire-resistance and stable chemical properties, phosphate ester is selected as the work medium. But its acid number is ...

磷酸酯以其优良的抗燃性能和良好的化学稳定性成为EH系统的工作介质，但其酸度易发生变化而引起抗燃油的老化。。。

But in the long-term use of the process, it has a few shortcomings, such as the deformation of cement stabilized macadam base become poor, it is easy to crack with the changes in temperature and humidity, the high value of the modulus, high incidence of premature.

但是在长期地使用过程中，水泥稳定碎石基层的变形能力差，在温度和湿度变化时容易开裂：模量值偏高，易发生早期破坏的缺点。

The effects of irradiation on producing off-flavor compounds of bread with different improved treatments were also investigated.

然而，它在贮藏过程中易发生一系列物理和化学以及微生物的变化，进而影响面包的质量和货架期。

Lower estrogen level in females and lower testosterone level in males have been proved to be risk factors for AS. But organisms regulation and responsion to sex hormone level is an exquisite and complicated process with individual difference. It is not so simple as imaged by externally regulate sex hormone balance to prevent or delay the occurrence of AS. Great disputes exist in whether supplement of sex hormone, especially estrogen, can delay the occurrence and development of AS.

女性低雌激素状态，男性低睾酮状态已被多个临床研究证实是AS的易患因素之一，但由于机体对性激素水平的调节以及机体对性激素水平变化的应对是一个相当精细和复杂的过程且存在个体差异，试图通过外在地调整性激素平衡来预防或延缓AS发生并非象想象的那么简单，人为地补充性激素尤其是雌激素能否延缓AS发生与发展目前存在着争议。

Osteoporosis is a disease characterized by low bone mass and deterioration of microarchitectural bone tissue. The changes of bone tissue cause systemic bone pain, lumbago, arthrodynia, a increase in bone fragility and susceptibility to fractures, especially the danger of traumetic and spontaneons fracture. It severely demages the health and living quality of the aged.

骨质疏松症是一种以低骨量和骨组织显微结构退化为特征的疾病，骨组织的变化引起全身骨痛、腰背痛、关节痛等，并导致骨脆性增加，从而增加骨折危险性，易发生外伤性和自发性骨折，其严重危害老年人的身体健康和生活质量。

At the BCL of 500ms, 1000ms and 2000ms,the VWtimes increased markedly with the BCL prolonging, and the degree of increasing was even obviously when heart rate was slow (BCL=2000ms or 1000ms). The enlargement of VWs was a most important reason to increase the incidence of ventricular arrhythmias; 2）At the BCL of 500ms, 1000ms or 2000ms,the VWtimes of the premature stimulates S2 was at endomembrane were wider than at the outermembrane. We supposed that premature stimulates come from endomembrane was easier inducing VF compared with outermembrane;3The VWtime of unidirectional block was wider than reentry's, we can see that reporlarization dispersion changed dynamicly. 4The QRS polar of the premature stimulates was opposite the primary beats ,which suggesting that excitation of inducing premature beats was coming from epicardial. That is to say electrotonic potential take part in the creation of reentry;5With the ratio of the Tp-e/QT increasing the occurrence of VF was upgrading. So the ratio was an effective method to estimate the event of SCD.6 The VWtimes of S3 were broaden than S2's. But we can not study penetratingly, which is the contents of our future studies.

在BCL为500ms、 1000ms和2000ms刺激条件下，随着刺激周长的增加单向传导阻滞时间易损窗呈增大趋势；并且在心率较慢时(BCL为2000ms和1000ms)增大最明显，是LQTS患者室性心律失常发生率增加的原因之一；2）在BCL为500ms、 1000ms和2000ms刺激条件下，S2位于内膜侧时时间易损窗大于在外膜侧时的，推测来自于内膜侧的期前刺激易于诱发室性心律失常；3）折返激动时间易损窗小于在单向传导阻滞时间易损窗，折返易发生于S2刚进入单向传导阻滞区间时，这说明复极梯度的不均一是动态变化的；4心电图上倒置QRS波与正常S1刺激所引起QRS波极性相反，提示不同位置S2刺激引发的室性早搏的兴奋均来自于外膜侧，说明了电紧张电位扩布参与了折返的产生；5）Tp－e/QT可以反应跨膜复极离散度，随着Tp－e/QT比值的增加PVT的发生增多，其可以用来预测室性心律失常的发生。6）随着期前刺激数目的增加时间易损窗增大。

This paper studied the grinding mechanism of this new type superalloy on the base of systematical analysis of variable characteristics of the grinding force, grinding temperature, topography of ground surface, residual stress distribution and hardness distribution of surface layer, as well as morphology of surface layer from a metallographical point.

摘 要：为解决定向凝固高温合金DZ4在磨削加工中极易发生的磨削烧伤问题，采用先进的测试方法，对磨削过程中磨削力、磨削温度、工件表面形貌、表面层残余应力分布、表面层显微硬度、表面层金相组织等变化规律进行了分析研究，揭示出该种新型高温合金材料磨削烧伤机理。

When the heritability for shrivelling of the kernel surface is lower (about 18.67%),the condition of the kernel changes easily changes with that of the cultivating conditions.

小麦籽粒表面皱缩的遗传力很低，仅为18.67％，易随栽培条件而发生变化，宜改善栽培条件增加其充实程度。

Tu acetate true erosion after the image is not of major change, and erosion Tu pseudoaneurysm after acetic acid is formed easily,"GRAPE BUNCH" change.

涂醋酸后真性糜烂的图像不发生大的变化，而假性糜烂涂醋酸后则易形成&葡萄串&改变。

are gained that after widening, the settlement of two sides of the old road pavement is contrary, cross slope of old road is different, horizontal displacement of the old road pavement is minishes, the area of maxium settlement, maxium lateral displace and disease of old road is different as before widening.

分析结果指出：在拓宽段作用下，靠近老路中心一侧老路路面沉降逐渐减小，远离老路中心一侧沉降逐渐增大，相应横坡也在发生变化；老路路面的水平位移有较大幅度的减小；而且老路最大沉降、最大水平位移、最大剪应力及最易发生病害的位置与拓宽前也发生了较大的变化。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。