两层的

In this paper,the author discusses the multi-layer solution with two special limits in boundary layer of the singularly perturly boundary value problem and obtains uniformly valid zero order asymptotic expansion by using the matching asymptotic expanding method.

利用匹配渐近展开法，讨论了奇摄动边值问题中边界层内存在有两个特异极限的多层解，得出了奇摄动边值问题的一致有效的零次渐近展开

AVO analysis is suggested for solving to solve the difficulty in identification of thin alternating layers in exploration of oilfields. It can improve the current method that has no thickness variable in the formula of reflective and is limited by sampling rates in calculation of the coefficient in the time of domain. Using the relationship of stress and displacement on two interfaces, this paper derives the spectrum of reflective coefficient for any incidence angle and thiekness of thim layer based on the equation of seismic wave propagation in the frequency domain.

针对油气田开发中薄互层认识难的问题，提出从AVO分析解决困难，克服现有方法在反射系数公式中无厚度变量、时间域计算反射系数谱受采样率限制的不足，运用两个界面间位移与应力关系，从频率域地震波传播方程推导了任意入射角和薄层厚度下的反射系数谱。

This study chose two typical eco-civilized villages (Meiwan Village and Qiaonan Village in Danzhou City) as examples, and conducted questionnaire survey aiming at the residents' environmental awareness and village environment. The result indicated that the level of residents' environmental awareness of the two villages was medium, and remains mid-green level, and the pragmaticality of environment education was poor.

选取海南两个典型生态文明村（儋州市美万新村、侨南村），针对生态文明村居民环境意识和环境现状进行问卷调查，结果表明：两生态文明村居民环境意识水平为中等，主要停留在中绿层，环境教育的实效性差。

The cost of MRC technology is lower than that of single horizontal well. It can drill two or multibranch hole from one major bole and encounter the pay zones in different positions, which improves the drilling-in capability and effective area and increases the oil and gas production of individual well.

MRC技术除具有水平井的常规优势外，其成本比单个水平井低，它是在一个主井眼中钻出两个或多个分支井眼，从而钻遇多个不同空间位置的产层，增大储层钻穿几率和有效面积，进而提高单井油气产量。

The cost of MRC technology is lower than that of single horizontal well.It can drill two or multibranch hole from one major hole and encounter the pay zones in different positions,which improves the drilling-in capability and effective area and increases the oil and gas production of individual well.

MRC技术除具有水平井的常规优势外，其成本比单个水平井低，它是在一个主井眼中钻出两个或多个分支井眼，从而钻遇多个不同空间位置的产层，增大储层钻穿几率和有效面积，进而提高单井油气产量。

The repair of the cement concrete pavement is very difficult, there are two kinds of measures mainly both at home and abroad: the first one is adding asphalt concrete layer, the second one is adding cement concrete layer.

对水泥混凝土路面的修复比较困难，国内外常用的措施主要有两种：第一种为加铺沥青混凝土面层，第二种为加铺水泥混凝土面层。

In the middle of its south side are Baroque-style recessed open galleries with both ends slightly jutting out and with pilasters, while its main entrance on the east side is a Tashkent columnar porch.

建筑的南立面中部，为层叠式的敞廊，两端略前出；二层廊道，带有巴洛克式，两壁柱等装饰；而东立面主入口为塔什干柱式门廊。

Two basic shell structures are recognized based on study of brachiopods across the Frasnian-Famennian boundary in Hunan Province, South China, which are characterized respectively by the presence and absence of a tertiary columnar layer.

对华南湘中地区上泥盆统弗拉/法门界线附近的几种腕足动物化石壳体结构所进行的详细研究表明，其原始结构主要表现为两种类型：一是具有棱柱状第三层，二是缺失棱柱状第三层。

Moreover, daily analysis disclosed the extreme complexity in the appearance of the mid-latitude mesopause. It was observed that there are two kinds of mesopause, one locates at 83 km height with extremely low temperatures, the other locates at about 100 km.

逐日分析结果还揭示了中纬度地区夏季中间层顶异常复杂的表现，结果表明在这里可以看到两种位于不同高度的中间层顶，第一种位于83 km并且伴随异常低温，而另一种位于约100 km高度。

Both aurora display and auroral electrojet, as the most important manifestations of the energy coupling between the magnetosphere and the ionosphere, are resulted from particle precipitation,and greatly enhanced during substorms. However, they have rather different behaviors and AE-dependences.

极光活动加剧和极光电集流增强是磁层-电离层能量耦合的两种重要表现形式，它们同为磁层带电粒子向电离层沉降的结果，但是变化规律却非常不同。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。