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A primitive , bony freshwater fish Amia calva of central and eastern North America , with a long , spineless dorsal .

弓鱼北美洲中部和东部一种原始，多骨淡水鱼，具有长脊背

Hainan Island's freshwater fish (not including Anadromous Fish of) 15 Section 57 is 72 is.

海南岛的淡水鱼有15科57属72种。

Established in 1985, the original mission of the center was to study the impacts of nonindigenous species in the U.S., to restore imperiled freshwater and estuarine species, and restore anadromous fish populations.

该中心始建于1985年，其最初的任务是研究非本土鱼类在美国的影响，恢复受到威胁的淡水和河口物种，恢复溯河性鱼类种群。

Any of various freshwater or anadromous food and game fishes of the family Salmonidae, especially of the genera Salmo and Salvelinus, usually having a streamlined, speckled body with small scales.

鳟鲑鱼科的各种淡水或溯河性食用及捕钓鱼，尤指鲑鱼属和红点鲑属，通常身体呈流线形，有斑纹，鳞片等

Any of various freshwater or anadromous food and game fishes of the family Salmonidae,especially of the genera Salmo and Salvelinus,usually having a streamlined ,speckled body with small scales.

鳟□鱼科的各种淡水或溯河性食用及捕钓鱼，尤指□鱼属和红点□属，通常身体呈流线形，有斑纹，鳞片等

Any of various primitive elongated freshwater or anadromous fishes of the family Petromyzontidae, characteristically having a jawless sucking mouth with rasping teeth.

七鳃鳗，八目鳗一种七鳃鳗科的原始细长淡水或溯河产卵鱼，特点是长有无颌的吮吸嘴，嘴内有锉牙

Type genus of the Anatidae: freshwater ducks.

鸭科的模式属；淡水鸭。

Any of several freshwater bivalve mollusks of the genera Anodonta and Unio, found in the central United States, that burrow in the sand or mud of lakes and streams.

淡水蚌发现于美国中部的无齿贝属和珠蚌属几种淡水双壳软体动物的一种，在湖和河中的沙中或泥中挖洞

Base on content of chlorophyll a and feeding type of fish and shellfish a food web methods was designed to control eutrophilication. The native freshwater bivalve,Anodonta woodiana, was selected as a filter to remove the algae in the water. The result is quite satisfied and promising.

本研究以水中叶绿素a浓度为基础，鱼类食性为辅，发现使用本土种且具有经济价值之淡水圆蚌，来作为滤除水中藻类的生态方法颇具可行性，利用藻类吸收营养盐、圆蚌食用藻类、再将圆蚌移除之方式而达到降低水库营养盐能量的目的。

Fairy shrimp:any of various transparent freshwater crustaceans of the order anostraca that lack a carapace and characteristically swim upside-down.

&仙虾：透明的淡水鳃足类的任何一种，无甲壳并且倒置游动。&

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。