水冲

The flow characteristic of undershot water is analyzed on the principle of fluid dynamics, and critical condition and theoretical calculation equation of the length of continuous flow are obtained.

根据流体动力学理论对下冲水的流动特性进行分析，得到了下冲水流保持连续性的临界条件，推导了连续流长度的理论计算公式。

Once I shipped a sea so heavy that I had to stop and bale, with my heart fluttering like a bird; but gradually I got into the way of the thing, and guided my coracle among the waves, with only now and then a blow upon her bows and a dash of foam in my face.

有一次一个大浪冲过来使小艇积了许多水，使我不得不停下来，心里焦急得像揣着小兔子似地往外舀水。但我已逐渐习惯了，能够划着小艇在波浪中上下滑行，只是偶尔有点水从船头泼过来，溅起一股飞沫喷在我脸上。

Water closet flushing a common way siphoned-off ceremony and two.

坐厕的冲水方式常见的有直冲式和虹吸式两种。

It was also found that the protecting effect of erodents on the coating surface does exist. The protecting effect will be more evident if using erosion efficiency of unit mass erodent of sand in the slurry to describe the erosivity of erodent. Besides a model is proposed to explain the protection process. The wear mechanism of the coating is the co-operation of ploughing, cracking and ablation.

对涂层的SEM分析可知，除冲蚀粒子在涂层表面的犁沟作用，冲蚀磨损的结果造成涂层的表面生成了系列针孔，其中的一部分为溶剂挥发所至，另外还存在由增强颗粒的剥落和裂纹的扩展造成的涂层剥落产生的孔洞，这将可能为水的吸收和扩散造成有利条件，使复合涂层亚表层产生内应力。

Shin instantly carries the chair on his back and dashes out. Nevertheless, before they could completely pass the bridge, the most of the fort is sunk and the sinking force hauls the bridge into the water. Fortunately, except severely wounded Po, all the others can swim and as they are already near the shore, Phoeny is actually able to grab Shin and Po up and bring them to the shore at one time. Xue is holding Zen's waist with her left arm while substituting her right nature and demon arms for Zen's injured right arm and swim in chorus to the shore with him.

童心马上背著童博，向外便冲，可这城下沈得十分迅速，他们只冲过一半浮桥，整个城就已沈没大半，其下沈之力把浮桥也拖入水中，幸好除了受伤最重难以游水的童博之外，其他人水性均无问题，而且因为他们已离岸不远，小凤竟可将童心和童博同时抓起，带到了岸边，天雪则是用左手搂住童战的腰，右手和右边魔臂代替童战受伤的右臂，两人合力游到岸边

The Trojans advanced in a dense body, with Hector at their head pressing right on as a rock that comes thundering down the side of some mountain from whose brow the winter torrents have torn it; the foundations of the dull thing have been loosened by floods of rain, and as it bounds headlong on its way it sets the whole forest in an uproar; it swerves neither to right nor left till it reaches level ground, but then for all its fury it can go no further- even so easily did Hector for a while seem as though he would career through the tents and ships of the Achaeans till he had reached the sea in his murderous course; but the closely serried battalions stayed him when he reached them, for the sons of the Achaeans thrust at him with swords and spears pointed at both ends, and drove him from them so that he staggered and gave ground; thereon he shouted to the Trojans, Trojans, Lycians, and Dardanians, fighters in close combat, stand firm: the Achaeans have set themselves as a wall against me, but they will not check me for long; they will give ground before me if the mightiest of the gods, the thundering spouse of Juno, has indeed inspired my onset.

& 其时，特洛伊人队形密集，迎面扑来，赫克托耳领头先行，杀气腾腾，像石壁上崩下的一块滚动的巨岩，被泛涌着冬雨的大河从穴孔里冲下，凶猛的水浪击散了岩岸的抓力，无情的坠石狂蹦乱跳，把山下的森林震得呼呼作响，一路拼砸滚撞，势不可挡，一气冲到平原，方才阻止不动，尽管肆虐凶狂。就像这样，赫克托耳最初试图一路冲杀，扫过阿开亚人的营棚和海船，直插海边。然而，当接战对方人群密集的队伍，他的攻势受到强有力的止阻，被硬硬地顶了回来。阿开亚人的儿子们群起攻之，用劈剑和双刃的枪矛击打，把他抵挡回去，逼得他连连后退，步履踉跄。他放开嗓门，用尖亮的声音对着全军喊叫：&特洛伊人，鲁基亚人和达耳达尼亚人，近战杀敌的勇士们！和我站在一起！阿开亚人不能长时间地挡住我的进攻，虽然他们阵势密集，像一堵墙似地横阻在我的前头。我知道，他们会在我的投枪下败退，如果我真的受到神明的驱使，一位最了不起的尊神，赫拉抛甩炸雷的夫婿。

Limestone can not be erosion by cavitating water jets on the condition of the most pump pressure, but sandstone were greatly erosion.

空化水射流在本实验设备能达到的最高泵压条件下无法冲蚀破碎石灰岩，而对砂岩却表现出巨大的冲蚀能力。

The main research activities of the Department cover the general layout of hydro projects, hydraulics of spillways for high dams, energy dissipation and river bed or bank erosions, flow induced vibration, cavitation and air entrainment, river ice, hydraulic transient flow simulation and control on hydropower project, pumped storage project and long distance water transfer project, optimization of thermal/nuclear power plant and other industrial cooling systems, investigation of the fundamental theory of stratified/mixing flow and its applications, studies on fluid mechanics and thermodynamics of large scale cooling towers, hydraulic field observations for existing projects, development of instrumentation for physical model tests and field observations.

研究领域主要为水利水电枢纽总体布置、高坝泄洪建筑物水力学、消能防冲、流激振动、空化与空蚀、崩岸水力学与岸坡保护、河冰问题、水电站引水系统中的水力瞬变及调压井水力学研究、跨流域调水工程中的规划及水力控制数值仿真、冷却水的工程水力热力问题研究、环境水力学、火电厂水工模型试验与数值模拟研究、火电厂取排水局部泥沙冲淤试验、模型和原体监测仪器的研制和开发、以及过水现场原体监测。

For each strategy, a corresponding exploitation plan of groundwater was designed. Then each designed exploitation plan (except scheme 3) was put into the model for calculation and simulation. The analysis on the forecasting results every plan indicates that:(1) Shuting down the self-provided wells is the most direct and effective method, playing an important role in the land subsidence prevention.(2) The resumption of compressed soil by groundwater artificial recharge is limited. So the artificial recharge can\'t provide essential effect for the resumption of land subsidence, unless the artificial recharge is much more than the groundwater withdrawal.(3) The method of "adjusting the exploitation stratum of groundwater to the shallow" has an obvious effect on the land subsidence prevention.(4)"Sand wells" can increase the leakage recharge for confined aquifer, and thus can slow and prevent the development of the land subsidence.(5) For the groundwater exploitation in Xi\'an, emergency self-provided wells should be managed according to the well spacing of 1600m, 2000m and 1600m, respectively, in the river terrace area, alluvial-proluvial fan area and loess tableland area to exploit the first confined groundwater. Corresponding individual well yield can be set as 2500m~3/d, 1500 m~3/d and 200 m~3/d. Make emergency self-provided wells pump in the dry year and stop pumping groundwater to restore and conserve underground water sources in average years and wet years. In this way, groundwater withdrawal of 162000m~3/d can be obtained to provide for the supplement of water supply in Xi\'an. As a result, the water supply stress can be released in dry years. The groundwater depression formed in the exploiting year can resume in 3-4 years. At the same time, this exploitation manner will not lead to obvious land subsidence.

本文利用所建的模型预测了现状开采条件下未来20年的地下水位和地面沉降的变化，在此基础上，提出了防治西安市地面沉降的五个地下水开采方案，利用所建的地面沉降模型对各个设计方案其进行了模拟和预报，对预测结果的分析表明：①封停自备井是防治地面沉降最为直接和最有效的对策，对防治地面沉降起着最为积极的作用；②采用人工回灌方法使被压缩的土层得到的恢复是非常有限的，对地面沉降不能起到根治作用，只有回灌量明显大于开采量时才能有一定的效果；③&调整开采层次，在浅层取水&对防治地面沉降的效果十分明显；④布设&砂井&可以增加对承压含水层的越流补给量，从而可以有效地缓解和控制地面沉降的发生和发展；⑤对西安市的地下水开采，可在河流阶地区、冲洪积扇区和黄土塬区分别采用1600m、2000m、1600m的井间距布置应急自备井，分别采用2500m~3/d、1500 m~3/d和200 m~3/d的单井开采量，开采第一承压水，在平水年或者丰水年不开采，涵养地下水源，在枯水年启动这些应急自备井开采，在输出分析范围内共可获得162000 m~3/d(5913万m~3/a)开采量，可以有效地补充西安市的供水水源，缓解供水紧张局面，开采年开采导致的下降的水位可在停采3～4年后得到基本恢复，同时，这种开采方式不会造成大的地面沉降量。

Yes ah, do have to cherish the water, China has more than 6000 water shortage in cities, where you want to find a drop of water, which was very difficult, in our daily lives, we must cherish the water, for example: Wash rice with water, boiling face washing bowl and chopsticks, can save lives and reduce the detergent water pollution; bath tub to shower change and to use low-flow showerheads and avoid prolonged shower.

是啊，的确要珍惜水，我国已有6000多个城市缺水，在那里，想要找到一滴水，也是很困难的，在日常生活里，我们也要珍惜水，例如：用洗米水、煮面水洗碗筷，可节省生活用水及减少洗洁精的污染；洗澡改盆浴为淋浴，并使用低流量莲蓬头，避免长时间冲淋。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。