水流

Based on the lumped mass method and Newton's second law, the numerical model of the force and movement response for fishing nets in current was set up, and then the dynamic deformation and the equilibrium configuration of the plane net in current along the positive direction of x-axis were studied by means of computer numerical simulation method.

基于集中质量点法和牛顿第二定律，建立了网衣在水流作用下的受力和运动响应数学模型。

Numerical simulation results show that the typical features of primary flow, secondary flow and velocity redistribution in natural river bends are closely related to the special planform and flow depth conditions of natural river meanders. The lateral redistribution of flow is significant when water depth is small. The main stream approaches the concave bank upstream the bend vertex when river width is small.

数值试验结果表明，自然河流河弯中的主流、二次环流和流速重分布特征是与自然河弯的特殊几何形态特征、水深条件紧密相连的，水深越小则流速沿横向的重分布越为显著；河宽越小则水流动力轴线在凹岸的顶冲点越为提前。

The platypus is found in lakes, streams and rivers of eastern Australia.

鸭嘴兽出没于澳大利亚东部的河流，湖泊和水流中。

She pulled out the plug and the water drained away.

她拔掉塞子，让水流走了。

Working and destruction mechanism of protecting structure in high dam plunge pool is very complicated.

高坝消力塘作为防护下游河床的结构，其自身在高速水流冲击下的安全性是实现消能和防冲目的的关键所在，国内外都不乏破坏的实例。

The main achievements include as follows:(1)With research results of hydraulic jump and impinging jet,flow patterns in stilling basin and plunge pool are analyzed in detail, the distributing characteristics of mean pressure and fluctuating pressure are investigated.

主要成果包括：(1)引用水跃和冲击射流的研究成果，详细分析了底流和挑跌流消力塘内的水流流态特征，探讨了这两种型式消力塘内时均压力和脉动压力的分布规律。

For its unique hydrology, the rule of the non-point pollution of polder is particular and is very important to be studied.A typical agricultural watershed and runoff plots in polder areas around Taihu Lake were selected and experiment in situ was conducted.

同时由于圩区与外界水流交换的特殊性，其营养盐产生、迁移及转化规律亦具有其独特性和复杂性，因此研究太湖流域典型圩区非点源污染产污特征具有十分重要的意义。

The outside sea wave streams into near the shore and shallow water area, being subjected to a submarine friction function, the wave 锋 becomes abrupt, the trough of wave become slowly, the fluid matter orders sport track to present back and forth fluxion, and to shore enter the current velocity degree is usually bigger than offshore reflux speed, causing bottom sediment clean to shore porterage, and is aroused a shore wave of ascend the blunt water current take to the seashore on-line pile up.

外海波浪传入近岸浅水区，受到海底的摩擦作用，波锋变陡、波谷变缓，水质点运动轨迹呈现往复流动，而且向岸进流速度通常大于离岸回流速度，导致底部泥沙净向岸搬运，并被激岸浪的上冲水流带至海滨线上堆积。

I got out of him that young Portly hasn't learnt to swim very well yet, and I can see he's thinking of the weir.

这个季节，那儿还有大量的水流出来，而且，那地方总是让小孩子着迷的。

Water potential reflects energy level of soil water and the gradient of water potential is an impotent factor describing direction and velocity of water flow.

水势反映土壤水的能态，而水势梯度则是决定水流方向和速度的重要因素。

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。