河段

Nov. mainly inhabits those channels such as mahuang channel、gari channel、bori channel、heping channel and dengchi channel. So it belongs to the distribution area extremely narrow type. From May to October 2005 and May to August 2006, 671 specimens collected were used for studies on the reproductive strategies such as reproduction time, spawning type, the ratio and the fecundity, and gonad development and characters of early life history. The main results are as follows: 1.Every year speaking of spawning season the male"s is earlier than female"s slightly.

Nov。仅分布于宝兴河支流东河盐井以上河段，主要分布在蚂蝗沟、嘎日沟、波日沟、和平水域及邓池沟，属于分布区极其狭窄的种类。2005年5月—10月和2006年5月—8月共采集671尾标本，运用常规生物学指标的测定分析法和性腺的组织切片法，以及对成熟亲鱼人工授精获得的胚胎在立体显微镜下活体观察，研究其繁殖期、产卵类型、性比和繁殖力等繁殖策略及性腺发育和早期发育。

There was conspicuous contradiction appeal between water supply and demand in the Yellow River basin in 1997 because of much less precipitation and runoff than nounal and no-flow in the lower reaches in 1997 was the most serious in the records.

1997年，由于黄河流域降雨、径流量较常年明显偏少，水资源供需矛盾十分突出，黄河下游出现了有资料记录以来断流最为严重的一年，利津站于2月7日开始断流，截止到12月31日，断流13次，共计226d，与有记录以来的历史资料比较，呈现出断流开始时间最早、恢复过流时间最晚、断流河段最长、断流次数最多、断流时间最长等特点。

The plant floating-bed technology application in Miaojia river showed that the water quality of the plant foating-bed technology applied had preceded evidently than the comparing water, though the water quantity was exchanged largely. There existed a micro-ecosystem at the root aera of floating-bed plant which mainly consists of organic grain, algae, zooplankton, zoobenthos. The mode of "Oenanthe javanica -Ipomoea aqutica" floating-bed mode application realized the whole year run of plant foating-bed technology on polluted water. Hence, the mode is suggested in the following application.

植物浮床技术在苗家河的示范应用研究说明：在水量交换较大的情况下植物浮床技术仍然使示范河段水质优于对照段；浮床植物根际区存在着以有机颗粒、藻类、浮游动物、底栖动物为网络骨干的根系微生态系统：&水芹菜-水蕹菜&浮床模式可实现四季净化污染河水的周年运转，在后续应用中推荐使用此模式。

Rhine River is the most heavy water passway of the European traffic from ancient times.

从科隆到美因茨的近200公里的河段是莱茵河景色最美的一段，这里河道蜿蜒曲折，河水清澈见底。

The environmental transport of POPs in Dagu Drainage River selected as a typical example is reasonedly investigated in this article. Characteristics of sediment from DDR in Tianjin are analyzed. The mean value of TOC in sediments is as high as 8%, which is in favor of sorption POPs. The particle sizes of both suspended sediment and bottom sediment are mensurated by Malven Mastersizer. Silt accounts for about 60% in mass, while clay is about 10%. Particles of sediments belong to fine granule. Suspended sediment and bottom sediment mensurated by XRD mainly consist of quartz and illite, both account for 75.5% and 62.2%, respectively. The conformation of suspended sediment is very similar to bottom sediment from SEM photo.

采集自天津大沽排污河的底泥样品进行了特征分析：全河段底泥TOC含量较高，平均值约为8%，利于吸附POPs；Malven Mastersizer激光粒度仪测定了大沽排污河悬浮物和沉积物的粒径分布，结果表明主要以粉砂为主，占60%左右，其次为黏土，占30%左右，大沽排污河底泥颗粒属于细颗粒；悬浮物样品和表层沉积物样品经X射线衍射分析表明，石英和伊利石是大沽排污河底泥悬浮物及沉积物矿物的主要成分，两者之和分别占75.5%和62.2%；环境扫描电子显微镜结果表明，河流底泥悬浮物和沉积物的形态没有本质差别。

The main reason for this was resuspension.

随后又有升高，主要原因为沉积物的再悬浮；在丰水期距离A03站点11.5～15km，重金属浓度有低谷河段，随后又有一峰值，该位置比枯水期推后了约1.3km。

In recent years it is more severe because of temperature changes, mankind activities, scouring and silting.

由于近几年来气温的变化、人类活动、河床冲淤等流域环境的变化，使得凌汛的威胁不仅依然存在，而且发生冰害的河段有所增多，影响范围随之扩大。

In recent years, ice flood is more severe because of temperature changes, mankind activities, scouring and silting.

近几年来气温、人类活动、河床冲淤等流域环境的变化，使得凌汛的威胁不仅依然存在，而且发生冰情的河段有所增加，影响范围日渐扩大。

This passage inquiries into the present condition of the power grid, predicts the burden development of Xinjiang, analies the schemes about the develoment and susceptance of electric energy, then we can conclude that the transmission of middle kaidou river mainly with 500 kV through the comparison of the project.

本文主要通过探讨新疆电网的现状、预测新疆的负荷发展、分析新疆电源发展及电能消纳方案，通过分析比较输电方案得出新疆开都河中游河段输电系统规划以500kV输电为主。

Through the measures of increasing towboat thrust, improving manoeuvre performance of towboats and reducing barges and load of a fleet etc.

采用增加推轮推力，改善推轮操纵性能和减驳减载等改进措施，可将两坝间河段的通航流量级由上水的2万立方公尺/s提高到4.5万立方公尺/s。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。