加速度指的是速度随时间的变化率。
By acceleration is meant the rate of change of velocity with time.
包含在给定区域的质量随时间的变化率。
The rate of change with respect to time of the mass contained within a given region.
实验结果表明： 盘缘区域温度随时间的变化率大于中心区域温度随时间的变化率；
The results show that the rate of temperature vs time at large radium is greater than that at small radius.
作用在任意运动物体（系）上的力和力矩可以分别表示成流场中动力学涡量的一阶矩和二阶矩随时间的变化率。
The force and moment exerted on the solid body are expressed as the rate of change of the first-and second-order kinetic vorticity moments, respectively.
治疗缺口的趋势并没有随着时间的推移发生重大变化（率比：0.92；95%的置信区间：0.79–1.07）。
There was no significant trend in treatment gap over time (RR: 0.92; 95% CI: 0.79–1.07).
加拿大的心理学家说，“没有明确的证据可以显示，在过去十年或更多的时间里精神障碍的患病率有了显著的变化”-除了酗酒以外。
The Canadian psychiatrist says "there is no clear evidence that the prevalence of mental disorders has changed dramatically in the last decade or so" -- with the exception of alcohol abuse.
然而，他补充道：“这对于成比例的损失率中小小的变化都高度敏感，因为这些有毒资产的数目太大，并且被掩盖的时间太长。”
However, he added: "This is highly sensitive to small changes in the proportionate loss rate because the amount of assets is so big and the length of time that the assets are covered."
报告指出，黑人发病率高于白色人种。研究者还观察到，发病率在种族之间的这种差异随着年龄增长而减小，但不随着时间的变化而改变。
Incidence was higher among blacks than among whites, the report indicates. Racial differences in incidence decreased with age and have not changed over time, the researchers observed.
男性比女性更易患病，且随着年龄增长发病率在性别间的这种差异增大，而随着时间的变化差异减小。
Men were diagnosed more often than women, but gender differences in incidence increased with age and have decreased over time.
同时LPS直接刺激也促进了PMVEC对PMN的黏附率增加，其变化在时间与方式上几乎与ICAM - 1的表达增加同步。
LPS could directly induce the adhesion increase of PMVEC to PMN at almost the same time and in almost the same mode as ICAM-1 expressions.
全新世气候变化研究的策略之一就是不同时间分辨率的关键地点的选择。
One strategy of Holocene climatic changes research is the select of key area to different time resolution.
湖泊沉积作为气候和环境变化的信息库，能提供时间分辨率高达百年至十年尺度的气候变化信息。
As the information database of climatic and environmental changes, Lakesediment provides high-resolution climatic change information which at the scale of century or even decade.
地电阻率是观测地下介质电性结构随时间的变化。
Observe the electricity structure of underground medium and change over time in resistivity of ground.
通过对板岩试样进行泡水试验及膨胀试验，建立起板岩在吸水后吸水率、膨胀应力及膨胀变形随时间的变化规律；
Variation law of water absorption, dilation stress and dilation deformation with time were get from the water-absorption and dilation experiments.
在给定电子温度和密度剖面下，给出了杂质离子辐射率随时间和电子温度变化的计算结果，并讨论了相关物理过程。
The radiated power of impurity ions varying with time and electron temperature for given the profiles of electron temperature and density is calculated, and the corresponding physics is discussed.
低分辨率和高分辨率声波曲线实际上可以理解为幅度随地层深度或时间变化的信号或函数。
In fact, one can believe that the low resolution and high resolution sound wave curves are the signals or function which scope changes with the stratum depth and time.
针对网络控制系统中的无限时间最优方法，设计了一种基于输入变化率的新型滤波器算法。
Aiming at infinite horizon optimal control method, a new filter algorithm based on input rate of change is designed.
测定了化学抛光过程中紫铜的表面光反射率、失重、表面形貌和电位随时间的变化以及抛光过程的电流-电位曲线。
Changes in specular reflectivity, weight loss, surface topograph and potential with time and current-potential curves during chemical polishing were determined.
丹佛盆地的探井发现率随时间变化得很快。
The discovery rate for wildcat wells in the Denver basin has changed radically with time.
根据螺栓的轴向应力与超声波传播时间变化率的关系，作者研究了一种可直接测量螺栓轴向应力的仪器。
On the basis of relationship between bolt axial stress and rate of change in ultrasonic wave transmission time, the author has developed a device to directly measure axial stress in bolts.
不考虑空气系统的时间滞后，影响电池动态响应时间的主要因素为扩散浓差极化，它限制了电流的变化率。
Regardless of hysteresis of air system, the main factor that influences dynamic response of fuel cell is diffusion concentration polarization, which restricts the change rate of stack current.
方法：采用全蝎提取液给家兔、小鼠静脉注射，并测定其血小板最大聚集率、血栓重量、纤维蛋白原含量及优球蛋白溶解时间的变化。
Methods: the changing of platelet aggregation rate, the thrombus weight, the content of fibrinogen and the euglobulin lysis time were determined after SEF iv on rabbit and mice.
结果表明：地电阻率时间序列存在分维结构，并且在地震前有明显的降维变化。
Results show that the time sequence of earth resistivity displayed a fractional structure and an obvious reduction of dimensional variation before earthquakes.
水降解试验表明：共混材料的失重率随着降解时间的延长而增加，但在短时间内变化不明显。
Simple degradation test showed that the loss weight of the samples increased with the time but not very obviously.
通过计算液晶盒中的瞬时指向矢分布，得到光透过率随时间变化与扭曲角之间的关系。
The relation of the transient transmittance and the twist Angle is obtained by calculating the instantaneous distribution of the director in this mode.
应用该程序计算了包钢B114钢锭模内冷却的温度分布和凝固率随时间的变化规律。
Using the program, the relation between ingot temperature, solidfying rate and solidfying time of B114 ingot are obtained.
测定并分析了不同微波加热功率、加热时间条件下木材的表面温度、干燥速度和含水率的变化规律。
The changing regularity of drying speed, moisture content and surface temperature of wood was determined and analyzed at different microwave heating power and different heating time.
从反射率随时间的变化曲线，计算出不同退火温度下的固相外延速率。
From the time-dependence of reflectivity at different temperature the solid phase epitaxial (SPE) growth rate was calculated.
通过对草菇进行冷冻干燥实验，研究了过程中样品的中心温度及水分率随时间的变化关系。
The relations of temperature and water fraction versus drying time during freeze drying of mushroom have been studied.
取三种粘合衬与涤纶面料粘合，测试不同的粘合温度和放置时间条件下缩率的变化，并且进一步分析了这一变化。
Three kinds of fusible fabrics and polyester fabrics are tested. The changes of the shrinkage rates of polyester fabrics in fusible interlining in different temperatures and times are discussed.
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