多变化的

Single speed w/ coaster brake for simplicity and ease/forgiveness of construction, Multiple seat post holes for quick change for different riders.

单速水/过山车制动器简洁，易用/宽恕的建设，多座位后洞的快速变化为不同的乘客。

Collector current is proportional to concentration of dopamine in the range over 5.0×10〓mol/L to 5.0× 10〓mol/L and remains independent of ascorbic acid concentration to approximately 5. 0×10〓mol/L.

由于在收集电极上消除了由电位变化引起的充电电流和阴极-阳极工作时的反馈作用，多巴胺的检测限可达7.5×10〓mol/L，线性范围为5.0×10〓～5.0×10〓mol/L。

Moreover, the algorithm can converge to the desired userunder discretional initial conditions, and the performance of convergence andsteady-state behavior of the algorithm are more better than that of otheralgorithms.Therfore the proposed algorithm is a practical and valuable method in thefuture.

由于其步长的自适应变化，使得它在多径衰落信道中，依然具有较好的性能，而且在任意初始条件下，都能够正确收敛到目标用户，收敛速度更快，稳态性能更好，具有一定的实用性。

Through the study on the soil microorganism, soil enzyme activity in spruce forest, chrysanthemum alp and couch grass in the subalpine forests in western Sichuan, the result shows that the relativity of the soil microbial quantity is very prominent in the soil. The relation with the quantity of the soil microorganism is microphyte 〉 actinomycete 〉 fungi.

：通过研究川西亚高山云杉林、绣线菊一茅草群落、高山柳群落和茅草群落等林地的土壤微生物数量和酶活性的变化，结果表明：云杉针叶林群落中的土壤微生物数量最多，绣线菊茅草灌丛群落次之，茅草群落最少。

Aiming at the mathematic model of shafting crankle coupling vibration based on the subsection continuous mass model,the multidimensional frequeney analysis method is put forward and developed.Combining frequency change with shafting configuration parameter,it's more favorable to have direct analysis.The method...

针对基于分段连续质量模型的轴系弯扭耦合振动数学模型，进一步简化并提出多维频率分析方法，将频率变化与轴系的结构参数联系起来，有利于直观分析，同时给出分析振型、共振频率及共振模态等的方法

This paper discusses the method of hypothesis testing on equation parameters,and the way of getting new equations to explain the speed, cceleration and jerk through calculating the differential coefficient of cubic equation.

该文还介绍了方程参数显著性检验的方法，并通过对方程进行多次求导，得到新的方程，来描述研究期间土地利用类型面积的变化速度、加速度以及加加速度。

Compared with the light equation for cylindrical lens, the equation for conelens is much more complicated.

柱透镜在近轴平行光入射时，光线的振幅、相位、周期保持不变，而锥透镜的三者均发生变化，而且求解锥透镜的光线方程也比圆柱透镜复杂得多。

In order to explore the mechanism of the resistance to cucumber damping-off induced by plant growth-promoting rhizobacteria CH1, the physiological and biochemical method was employed to study the changes in activities of Phenylalanine ammonia-lyase, Polyphenol oxidase and contents of ferulic acid, chlorogenic acid, lignin, phenolic compound and flavonoid of phenolic metabolism in cucumber roots pretreated with plant growth-promoting rhizobacteria CH1 and infected by Pythium aphanidermatum.

为研究植物生长促生细菌CH1诱导黄瓜对猝倒病的抗性的作用机制，采用生理生化的方法，测定了黄瓜根部酚类物质代谢中苯丙氨酸解氨酶、多酚氧化酶活性动态及阿魏酸、绿原酸、木质素、总酚、类黄酮含量变化。

Cost management is one of the important domains of accounting management.

成本管理是会计管理的重要领域之一，随着社会经济环境的变化，传统的成本管理模式显示出诸多局限性。

Methods The levels of serum Hcy, folate acid and VitB12 were measured in 169 patients with cerebral infarction and 110 normal controls. The condition of carotid arteries was checked by color dopper flow image in CI group. The relationship between the level of serum Hcy and folate acid, VitB12 and CAA condition were analysed. The change of serum Hey level was observed after intervention treatment of folate acid and VitB12 for 4 weeks in CI patients with hyperhomocysteinaemia.

测定169例脑梗死患者及110名正常对照者血清Hcy、叶酸、维生素B12水平；应用彩色多谱勒显像仪对脑梗死患者颈动脉进行检测；分析血清Hcy与叶酸、维生素B12水平以及与CAA程度的关系；观察叶酸、维生素B12干预4周后伴有高Hcy血症的脑梗死患者血清Hcy水平的变化。

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。