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Secondary pollution might be produced in the weak zone while conventional acidify because of halfway flowback under poor producing energy. Thief zones can obtain superfluous acidizing fluid because of the permeability contrast between layers of prominent interlamination antinomy, which can induce collapse in the thief zone and invalid acidification in the less permeable layers.

低压油气层常规酸化时由于地层能量低，导致残酸溶液无法彻底返排而引起地层的二次污染；层间矛盾突出的地层，由于渗透率差异，酸液将优先进入高渗地层，导致高渗透层进酸量多，从而过度酸化引起坍塌，低渗透层则由于进酸量少而达不到酸化的目的。

Finally, based on the software ERDAS IMAGINE9.1, the paper provides a real case on the 3 S spatial information integration technology to explain its application outlook in the project management, and analyses its relation with the project management. Such as, intervisibility domes analysis, flood layers analysis, mist and cloud layers analysis, spatial navigation mode analysis, 3D animation analysis, virtrual roaming analysis etc.

最后，以遥感软件ERDAS IMAGINE9.1为平台，用具体的工程实例来检验了"3S"集成技术在工程项目管理中的应用前景，并对其进行了和工程项目管理有关的洪水淹没分析、模拟云雾层分析、威胁性和互视性分析、虚拟漫游分析、三维动画分析、空间导航等实用性分析。

1A bipolar junction transistor is a three-layer silicon device consisting of either two p- and one n-type layers of materials or two n- and one p-type layers of materials.

模拟电路用于处理在 0 伏到电源电压之间任意变化的信号。

It is occupancy seventeen layers in totally twenty-one layers which discovered in industry hydrocarbon reservoir from Sinian system to Jura system.

在已发现的工业油气层从震旦系至侏罗系共有21层，碳酸盐岩储层占有17层。

Self-buckled kerbstones consist of two different layers of compound cement. They are of many kinds of designs and colors. On the outer layer, there are illuminating materials made by special materials. The inner layers are made of common cement, so they are low in price. At the two ends of the kerbstone, there are concave and raised troughs for self-buckling. So they are convenient in installment. Different size of holes for draining water can be drilled according to actual situation.

自扣式侧石是由两层不同颗粒级配比的复合混凝土构成，具有多种图案和色彩，面层附有由特殊材料制作成的发光材料，内层为普通混凝土，成本低廉；侧石的两端有凹凸卡槽自扣连接，安装方便，不易沉降和倾斜；还可根据不同需要的距离可在不同位置上留有大小不同的排水孔，雨天能够及时排除路面积水，从而丰富花池，花坛及道路两侧绿化带水源。

It takes between 20 and 40 layers of Kevlar to stop a bullet, and this stack of layers is relatively stiff.

阻碍子弹需要20到40左右的纤维层，这么一叠纤维就很硬了。

The contents of N, P, K in leaves were examined by regular leaf analysis. The results showed that the N content was higher in leaf blade than in leafstalk. N content in leaf was gradually reduced along with the vine growth. N, F, K fertilized at 20 to 40 cm soil layers significantly increased N content in leaf. But N content in leafstalk was less affected by N fertilization depth and growing season. P content was higher in leafstalk than in leaf blade. Less change of P content was noticed in leaf along with vine growth. However, N, P, K fertilized at 40 to 60 cm soil layers significantly promoted P in both leaf blade and leafstalk. K content in leafstalk was much higher than in leaf Wade. No obvious influence was noticed by fertilizing depth. But K content in leafstalk was significantly increased due to applied K fertilizer in late growing season.

结果表明，酿酒葡萄叶片中氮含量远高于叶柄，叶片中氮素含量随着生育期的延长逐渐降低，而叶柄中氮含量随施肥深度增加和生育期延长而产生的变化很小，40cm的施肥深度能显著增加叶片中氮素含量；叶柄磷素平均含量高于叶片，全生育期叶片磷含量变化很小，而施肥60cm深度显著促进了叶片和叶柄中磷含量的提高；叶柄中钾含量远高于叶片，施肥深度对叶柄和叶片中钾含量未产生明显影响，但生育后期追施钾肥显著提高叶片钾含量；施肥深度达到40cm时酿酒葡萄的产量最高，而60cm的施肥深度产量显著下降。

For increasing the electric power quality of power system,a power quality management system based on electric power Wide-area Net is established,which is a classified and destributed management system,divided into three layers,that is terminal layer;local net power quality data management system;and central data management system,the WAN is used as a communication medium between layers.

摘 要：为了提高电力系统供电的电能质量，江苏电网已建立了一套网络型电能质量管理系统。该系统是一个分层、分布管理系统，系统分成三层，即监测终端、地区电网电能质量数据管理系统和中心数据管理系统，以广域网为层间通信介质。

Due to there are some pyrite tubercles in some silt, according to that pyrite tubercles can bring low electric resistivity reservoirs, study on the origin of the low electric resistivity reservoirs in study area and use the method of clustering differentiate of low- resistivity layers by logging eigenvalues to forecast some low- resistivity layers in study area.

根据部分粉砂岩储层中含有大量黄铁矿结合的现象，对研究区低电阻率油层的成因进行了总结，并使用试油资料为标准样进行测井特征聚类判别的方法对研究区低阻油层进行了预测。

The palisade is from one to two layers thick, the spongy mesophyll usually cosists of four layers of cell.

在下表面气孔完全暴露，多数是开放的，而上表面的气孔多数是关闭的。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失