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However, the solutions of the Cauchy problem of the nonlinear hyperbolic system generally develop singularities in finite time even if the initial data are small and smooth.For this reason, solutions must be found in the space of discontinuous functions. Therefore, one can not directly use the classical analytic techniques that predominate in the theory of partial differential equations of other types. Instead, we construct approximate solutions via the singular perturbation methods. By using the compactness of the approximate solutions, we can obtain the existence of the solutions of original system.

然而一般而言，即使是在初值很小且光滑的情况下，非线性双曲型守恒律的Cauchy问题的解在有限时间内也会出现奇异性，为此，我们必须在不连续函数空间中寻找上述问题的解，因此对这类问题的研究，我们也不可能直接利用在其它类型的偏微分方程中占主导地位的解析方法来解决问题，而是通过奇异扰动法构造近似解，由近似解的紧性得到原问题解的存在性。

At present, the communication facilities are developed, a friend of the regular contact by telephone, call become an indispensable element in daily life, while in her class of children aged too small and most are single children now, the prevailing there inadvertence The act, so this game full of characteristics of the times and with the current child care characteristics of the age.

目前，通讯设施非常发达，朋友间经常以电话联系，打电话成了人们日常生活中必不可少的内容；同时中班上册幼儿年龄偏小且现在多数都是独身子女，普遍存在出现粗心大意的行为，所以这一游戏既富有时代特征又符合当前幼儿的年龄特点。

The main innovations in this dissertation are the following:(1) High refractive index glass beads are made by laser;(2) Large and small beads inlayed films are fabricated;(3) The second rainbow method is presented and used on measuring the refractive index of high refractive index glass beads.

本论文的创新点在于：(1)用CO〓激光成功地制作了高折射率玻璃微珠；(2)完成了大小珠镶嵌结构的微珠列阵逆向反射膜的实验设计和制作；(3)提出并实现了用二次彩虹法测量高折射率玻璃微珠的折射率。

Superreal and surreal numbers extend the real numbers by adding infinitesimally small numbers and infinitely large numbers, but still form fields .

这一原则允许真正的第一道命令声明R以将重新成为真正的第一道命令声明*河

Complete your examination by scanning the entire abdomen and make sure to collect several measurements of the small and large intestinal wall thickness.

完成整个腹腔的扫描，并确定收集记录，几个小肠与大肠的肠壁厚度。

Methods The clinical data of 37 cases of small intestinal bleeding confirmed by surgery and pathology was analyzed retrospectively.

探讨小肠出血的原因、诊断和治疗方法回顾性分析37例经手术及病理证实的小肠出血的临床资料。

By now Krone has been to about 50 balls, big and small.

迄今为止，克朗已经参加了大大小小约50场舞会。

Results of chromosomic analysis showed that the chromosome of Beijing Fatty Chicken, Langshan Chicken and Small-tailed Han Sheep were mainly diploid and the individuals of diploid occupied 87.1%, 86.7%, 93.4% in population observed respectively. The chromosomic structure mutation was 1.5%, 0.8%, 1.4% respectively that different from chromosomic morpHology results reported by other researchers.

染色体分析结果表明，北京油鸡、狼山鸡、小尾寒羊成纤维细胞均以二倍体为主，二倍体染色体数目分别占所观察数目的87.1％、86.7％和93.4％；染色体结构变异率分别为1.5％、0.8％和1.4％；染色体形态与前人报道的其他品种相比略有不同。

In addition, we passed by in Feldkirch, Bregenz and small artistic Liechtenstein.

再去了 Feldkirch， Bregenz 跟很小很艺术的国家 Liechtenstein 。

Such accelerant was a mixed-microbial-agent supplemented by distiller s grains lixivium and small quantity of inorganic salt.

偏低温沼气促进剂由微生物混合菌剂辅以酒糟浸出液和微量的无机盐成分而成。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。