What was around the bend in rivers hundreds of millions of years ago?
几亿年前，蜿蜒的河流的两岸是什么呢？
The reactive nitrogen in acid rain kills insects and fish in rivers and lakes.
酸雨里的活性氮将河和湖里的昆虫和鱼杀死。
Eels may spend decades in rivers before returning to the ocean to spawn, after which they die.
鳗鱼在河里也许要生活几十年，然后返回大海产卵，继而死去。
Blue catfish is native to 20 states, primarily within the Mississippi river Basin but also in rivers along the Gulf Coast.
蓝鲶在美国的20个州都有分布，最初生活在密西西比河盆地和墨西哥湾沿岸的河流中。
He was expatiating upon the benefits of swimming in rivers, lakes and seas.
他正详细说明到江河湖海中去游泳的好处。
Water in rivers and lakes is clear . Wherever you go, you can see trees, grass and flowers.
河水、湖水清澈，无论你到哪里都可以看到花草树木。
This scheme had considerably improved the water quality in rivers within the New Territories.
发牌计划大大改善了新界河流的水质。
A method to calculate the fall coefficient of COD in rivers which have many DAMS was put forward.
提出在多闸坝河流上，利用枯水期断面化学需氧量同步监测数据测算COD综合衰减系数的方法。
This will also add to sediment in rivers and reservoirs, affecting storage capacity and water quality.
这也会增加河流和水库的沉积物，影响蓄水容量和水质。
In Costa Rica and Mexico, these markets let water users compensate upstream forest owners for reducing sediments in rivers.
在哥斯达黎加和墨西哥，环境市场让用水户补偿上游林地所有者，以减少河流中的泥沙淤积。
The formation of floods in rivers is closely related to the interaction between human activities and flood environment.
江河洪水的形成与人类活动和洪水环境的相互作用密切相关。
Only 0.3 percent of the fresh water is surface water, found in rivers and lakes. The rest is buried deep in the ground.
只有0.3%淡水是地表淡水，这些淡水来自河流和湖泊，其余都深埋在地下。
Thirdly, pollution is also a worrying problem—water in rivers and wells becomes undrinkable because of industrial wastes.
另外，因为工业污染，有些水已经不适宜饮用了。
But it has many different areas of interest to visitors who like to hike, camp, climb rocks, raft in rivers, fish and hunt.
但它拥有很多有趣的地方适合那些喜欢远足，野营，攀岩，漂流，钓鱼和打猎的人。
Glaciers are melting rapidly, which causes flooding (as recently in Pakistan) but decreases the amount of water in rivers or lakes.
冰川正迅速地融化，这将带来洪水(就像最近在巴基斯坦发生的那样)，但却会导致河流和湖泊里的水减少。
The oxygen transfer theory cannot be used to predict the reaeration coefficient in rivers due to some undetermined parameters.
氧传输理论因存在不确定的参数而不能用来预测河流复氧系数。
Water levels in rivers are low, with the result that hydroelectric plants are generating about a fifth less electricity than normal.
河流水位普遍偏低，这就导致了水力发电站只能产出不到平时五分之一的发电量。
Not only was gold mined there, it was found in rivers too, where the gold particles were collected using lanolin-rich sheepskins.
人们不但在这里开挖金矿，而且在河里也能找到黄金。 人们用富含羊毛脂的羊皮在河水中收集黄金颗粒。
To better control and prevent water pollution in rivers, it is necessary to know the conditions of water quality in rivers in time.
为了更好的对河流水体污染进行控制和治理，及时了解河流的水质状况是必要的。
Computation of erosion and deposition on the bed surface is a foundation of predicting bed variations in rivers, estuaries and seas.
冲淤计算是河流、河口、海岸等水域中分析、预测床面变化的基础。
The world is said to have about 3,000 times as much groundwater as water it has in rivers and lakes, and groundwater is far cleaner.
据说地球拥有的地下水量大约是其拥有的河流和湖泊水量的三千倍，而且地下水要干净得多。
It's been known to swim hundreds of miles upstream in rivers like the Mississippi and can be found in fresh water many miles from the ocean.
牛鲨曾经沿如密西西比河逆流而上数百里，也可以在远离大海的淡水区域发现它们的踪迹。
Often Beaver builds DAMS in rivers or streams to assist in moving the water into the forest or into underground waterways to allow life to thrive all around.
海狸常常在河流或溪流边构建水坝来协助水流向森林或流进地下水道以允许生命可在周围茂盛生长。
The vertical line transducer can be used in rivers, lakes, seas to measure tide, wavy, smooth sea, wave direction, velocity, and underground water level, etc.
它可广泛应用于江、河、湖、海中测量潮汐、波浪、微浪、波向、波速以及地下水位等等。
Advances in recent 30 years in the theories of watershed runoff generation, flood wave movement in rivers, and watershed flow concentration are briefly introduced.
根据国内外文献资料，对近30年来流域产流理论、河道洪水波运动理论和流域汇流理论的新进展作了扼要介绍。
Just as the relentless movement of water in rivers and streams can smooth the jagged edges of rocks over time, ocean currents can smooth ice fragments into round shapes.
奔流不息的河水，随着时间流逝，能够将边缘锋利的石头打磨光滑，与此类似，洋流也可以将冰块的边缘打磨圆润。
Just as the relentless movement of water in rivers and streams can smooth the jagged edges of rocks over time, ocean currents can smooth ice fragments into round shapes.
奔流不息的河水，随着时间流逝，能够将边缘锋利的石头打磨光滑，与此类似，洋流也可以将冰块的边缘打磨圆润。
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