有前提的

The similarity conditions of geometry, flow movement and dynamics of air bubbles are analyzed.

从气体运动状态方程出发，研究了竖井有压流动模型中气水两相流的运动规律，分析了气泡几何相似、运动相似以及动力相似的条件，指出掺气浓度相似律是研究气水两相流相似问题的又一必要条件，即原、模型的掺气浓度必须相等，前提为大气压强或密度相似。

The existential import is needed only when we make the following three kinds of inferences in categorical logic: conversion by limitation,the syllogisms with existential conclusions and two universal premises,and the inferences of contrariety an...

词项逻辑中涉及预设的地方仅为有限量换位推理，两个全称前提推出特称结论的三段论推理及反对关系推理和下反对关系推理所需预设均为：主项存在。从操作层面上看周延规则不是普遍适用的；从深层次来看，如考虑到预设，那么周延规则是普遍适用的。

As steady error coefficient is an important index in measuring system error, it is introduced into the performance index set. A solution of satisfactory biased estimation strategy is proposed by assuming that the maneuver of target is finite, which can ensure the accuracy and stability of the estimation output.

稳态误差系数是衡量系统误差的一个重要指标，于是本文将估计系统的动态误差系数纳入多指标约束，借助满意估计理论，在假定目标机动强度有限的前提下，给出了可兼顾滤波输出精度和平稳性要求的满意有偏滤波器的设计方法。

The exertion of the active role requires the premise and its forms, which is also affected by some restrictions.

这种作用的发挥需要一定的前提，有其发挥的形式，也受一定条件的限制。

Some scholars like Isao Kurosaki thought that public school choice would benefit for parents'and students'rights to education, and should raise public schools'quality, improve students'various identities, and finally extend educational opportunity.

但是可以明确的是学校选择制度的实施必须以多样化教育、多样化学校的创建为必要前提，并且必须有保证弱势群体的平等机会的补偿性政策措施。

Strive hard to reach the sale index and profit indexBut, it is a fatal lacuna for all outlets in controlling inventory level and placing orders that only historical sale and stock figure are provided without the ability to forecast the customers'needs on the basis of historical sale and stock figure by scientific method, and without cost analysis and ability to order on the basis of minimal total cost.

但是"只有历史销售数据和库存数据，缺少对当前库存的成本分析，缺少凭借历史数据预测未来需求和在库存总成本最小化的前提下进行科学订货的能力"是所(来源：Afd9dBC论文网www.abclunwen.com)有大卖场在控制库存和合理订货时的最大缺陷。

The way to use PMP to solve problem is a kind of sifting method:"If the control isreally an optimum one,then under the conditions stated beforehand,the needle variationmust not cause the index to have negative variation."

Pontryagin的最大值原理解决实际问题是筛选的方法："即如果是最优控制，那么其在满足约束条件的前提下，必须有进行针状变分不会造成指标泛函的变分为正。"

At this institute, our goal is to discover new medicines regularly and predictably, based on an understanding of molecular mechanisms of disease.

我的翻译是：我们研发机构的目标是，在对疾病的分子机制充分了解的前提之下，定期地和有预见性地发明新药。

Principal stress in the direction of zero principal strain has significant effect on strength and deformation of soil in plane strain state.

零应变方向的主应力对平面应变状态下土的强度和变形均有重要影响，认识土的弹塑性特性是正确确定零应变方向主应力的前提。

It's an awful deed to prohibit people from speaking or exploit their right to speak.

目前，在已经有这样好的环境和技术手段的前提下，如何表达自己的观点，如何去说话，如何去倾听别人说话成了我们每个人都要注意的问题。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。