查询词典 three-body problem

In three-quarters of the cryptorchid boys, the testes descended into their natural place within 3 months after birth. A quarter of the boys needed surgery to correct the problem.

四分之三隐睾患儿在出生后3个月会下降至正常位置，剩余四分之一需要手术纠正。

Besides, the experimental group also shows a significant improvement in the spatial perception, spatial orientation, spatial relation and spatial reasoning. According to the logs recorded by Happy Cuber within the three weeks learning, the progress of the students in accuracy and problem solving time is obvious. The stage of Happy Cuber in developing part is harder than the folding part for students, whether in folding or developing part, the cross-shaped net is the highest accuracy and shortest response in all cubic nets.

从教材操作纪录内容的变化来看，学生在游戏中的答题正确度与解题时间随著教材使用次数渐次提升，统计分析后发现，立方体拆解题型难度要比展开图摺合题型高，十字型展开图不论是摺合或拆解上，在正方体11个展开图中都是费时最短且正确率最高的类型。

In this paper, the problem of an arbitrarily shaped planar crack which is perpendicular to the interface of bimaterial and loaded by interior normal pressure is studied by means of the method of hypersingular integral equation in three dimensional fracture mechanics.

利用三维断裂力学的超奇异积分方程方法，对双材料空间中重直于界面的平片裂纹Ⅰ型问题进行了研究。

In this paper, by using Brown Motion, the formula at the crucial point of probabilistic computing method is proved theoretically, and a probabilistic computing method for the three-dimensional Dirichlet problem is given.

本文运用布朗运动，对概率算法中的一个关键公式给予了理论上的证明，并对三维Dirichlet问题提出了概率算法。

In part two, we study the Dirichlet problem for a reaction-diffusion system of three species: a predator, a mutualist-prey and a mutualist.

第二章讨论了一类具有扩散的捕食-食饵-互助系统共存态的存在性问题。

Three solution algorithms for classical transportation continuous/discrete/ mixed network design problems are designed based on particle swarm optimization approach, in which the continuous NDP is studied in detail, discrete and mixed NDP are only described the frameworks of the solution algorithms.2. Generally, road capacity constraints must be added to the lower level problem of classical discrete NDPs bilevel programming model in order to avoid traffic assignment on candidate roads.

本论文研究工作主要有如下几个方面：(1)基于粒子群优化思想设计了求解传统的城市道路交通网络设计问题的算法，其中详细研究了连续网络设计问题，并用两个网络例子进行了数值实验；并给出了离散网络设计问题和混合网络设计问题的求解算法思路和主要步骤。

In experience analysis, giving actual rural-urban inequality as the jumping-off place, points out that our country have clear dual-economic and social struction characteristic, and analyze the reasons for which dual-economic and social struction is formed and retained; rural modernization is key to our countrys modernization for the following aspects,on the one hand, the problem of the farmer and rural and agriculture have strategic position and role, on the other hand, rural is the focus of a series of realistic problems; I closely grasp three mainlines of rural modernization, namely agriculture modernization and rural industrialization and rural-to-urban population migrants , we could make them united organically and make a research for them relatedly and discriminatingly, then some policy recommendations are offered.

在实证分析方面，以我国农村经济为研究对象，从现实的城乡差别入手，指出我国具有鲜明的二元经济社会特征，分析二元经济社会得以形成并维持的原因；从"三农"问题的地位与作用以及农村是一系列现实问题的焦点两个方面，论述农村经济现代化是中国现代化的关键；紧紧抓住农村经济现代化的三条主线，即农业现代化、农村工业化和农村人口城镇化，把三者内在、有机地结合起来，既有联系又有区别地进行研究，提出有针对性的对策建议。

This paper discusses the problem of status changing of Chinese distillery to a brand operator in order to meet the more intense market competition from three aspects.

从三个方面来探讨中国酒类企业如何向品牌运营商的身份转变问题，以迎接更为激烈的市场竞争。

In this paper we will investigate the embedding problem for uniform resolvable group divisible designs with block size three.

本文主要研究区组长为3的均匀可分解可分组设计的嵌入问题，并完全解决了这个问题。

III. Analyze the puzzledom of agriculture insurance in China and three basic problems which we need envisage for further development,after reviewing the history and actuality of agriculture insurance. It is deemed that the basic problem of agriculture insurance which must be solved is its effective supply and demand. Management governmentally or commercially,concentratively or divisionally are also very important.

第三，考察了中国农业保险发展的历史与现状，分析了中国农业保险陷入"窘境"的根本原因，探究了中国农业保险发展必须直面的三大基本问题：农业保险的有效供给和有效需求问题、是政策性经营还是商业性经营问题、是集中统一经营还是区域划分经营问题。

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。