本文考虑二级火箭在实际允许区域内的最佳质量比问题，得到解的解析表达式。
On the optimum mass ratios of two-stage rocket in the practical permissible region, we get the results analytic expression.
通过对双质量振动系统的动力学参数及其相互关系的分析，提出了最佳质量比的确定方法。
A method for determination of the optimum mass ratio was proposed on the basis of analyzing the dynamic parameters of double mass vibrating system and their relationship.
大学生的生活质量比社会一般人群好，而消极感受与一般人群相似，改善学生生活质量的最佳切人点是降低消极感受。
DiscussionThe quality of college students 'life was better than general people, but the negative feelings of the students were similar to the general people.
分析了高压断路器操动机构在工作过程中运动件的碰撞现象和计算方法，并分析了在不同要求下两碰撞件最佳碰撞质量比。
This paper analyzes the impact phenomenon and its calculation method in operating device of HV circuit breaker, and shows the optimal mass ratio in the different situation.
也可与粘土矿物混合使用，显著提高粘土矿物对有害藻类的絮凝效率。槐糖脂与黄土的最佳混合比例为质量比1∶100～200。
It may be also used through mixing with clay mineral to raise the flocculant efficiency organic clay mineral obviously, and the optimal mixing weight ratio to loess is 1 to 100-200.
也可与粘土矿物混合使用，显著提高粘土矿物对有害藻类的絮凝效率。槐糖脂与黄土的最佳混合比例为质量比1∶100～200。
It may be also used through mixing with clay mineral to raise the flocculant efficiency organic clay mineral obviously, and the optimal mixing weight ratio to loess is 1 to 100-200.
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