查询词典 freshwater

Freshwater crabs are special taxa in Brachyuran crabs which completely live in the freshwater.

淡水蟹类是短尾类中完全适应淡水生活的一个特殊类群。

Freshwater clam Corbicula fluminea is the most important freshwater bivalve in Taiwan.

台湾蚬的养殖在台湾为所有二枚贝类中产量第三名，也是淡水贝类中产量第一名。

Widely distributed in Central America of fresh water and salt waters, the United States for the main freshwater aquaculture species. 1999 U.S. freshwater aquaculture production accounted for about 81 percent of the large warm-water species of fish, fork spots to fish tail as the Ministry of Agriculture to promote the country's fresh water breeding improved varieties have a very obvious advantages: First of Table no scales no small thorn, processing convenience and the other is the quality and refine, nutrient-rich, easy to digest and absorb the third is of miscellaneous eating habits, fast-growing, high yield, strong adaptability and easy to keep the fourth character is tame, like cluster activities , High density of aquaculture, particularly the pond custody and cage culture Fifth Tansi, easy fishing, Youdiao suitable for the development of leisure industry.

广泛分布于美洲中部的淡水和咸水水域，为美国的主要淡水养殖的品种。1999年约占美国淡水养殖总产量的81%，该鱼种是大型温水性淡水鱼类，斑点叉尾回鱼作为农业部向全国推广的淡水养殖的优良品种具有很明显的优点：一是体表无鳞没有小刺，加工方便；二是内质细嫩，营养丰富，容易消化吸收；三是食性杂，生长快，产量高，适应性强，易于饲养；四是性格温顺，喜好集群活动，可以高密度的养殖，特别是池塘主养和网箱养殖；五是贪食，易垂钓，适合发展休闲游钓业。

Physiological Responses of Hybrid Striped Bass to Aqueous Copper copper is an abundant trace metal, and although essential at low levels, it is also potentially toxic to aquatic organisms.Mechanisms of toxicity and consequences of exposure vary depending on ionoregulatory status(acclimated to freshwater or salt water).The goal of this research was to examine the responses of hybrid striped bass(Morone chrysopsXMorone saxatilis)exposed to Cu in freshwater and 15g/L salt water.In freshwater,a general dose-and time-dependent pattern of increasing Cu accumulation in gill tissue was evident in fish exposed to aqueous Cu(220 and 447 mg/L)for up to 96 hours.The 96-horu acute median lethal concentration for freshwater-acclimated hybrid striped bass exposed to Cu was 94mg/L(confidence interval=62 to 144mg/L).

生理反应到水的混合条纹鲈鱼铜是一个丰富的微量金属，虽然至关重要，它是在较低的水平也可能对水生生物有毒毒性机制及其后果的曝光取决于ionoregulatory状态，本研究的主要目的是为了检查的反应chrysopsXMorone混合条纹鲈鱼暴露于铜在淡水和15 / L盐水在淡水，一般dose-and时变模式日益增长的铜积累鱼鳃组织显然暴露于含水的铜(220和447毫克/升)长达96小时96-horu致命的平均浓度为freshwater-acclimated急性混合条纹鲈鱼暴露于铜被94mg / L(=置信区间来144mg / L)62 osmolatity、钠浓度降低。

Sold as a natural freshwater pearls cultured pearls; shell carving, material for the natural freshwater / sea shells; fittings and shellfish shell handicrafts, stone carving shadow carving, pearl jewelry, according to customer demand for design, proofing, and processing services.

所售珍珠为天然淡水养殖珍珠；贝壳雕刻，材质为天然淡水／海水贝壳；贝壳配件和贝壳工艺品，石雕影雕，珍珠首饰，可按客户需求，提供设计，打样，加工服务。

There are 44 million Americans fishing today, Largemouth bass the largest species of the freshwater sunfish family are America 's most popular freshwater game fish .

有4400万美国人捕鱼今天加州鲈鱼种，最大的淡水太阳鲈是美国家庭的最热门游戏淡水鱼。

In the study XRD, FT-IR, PCR amplificator, 373A DNA sequencer, GC, electrophoretogram and TEM apparatuses and so forth are used to give a way for accurately scientific research. It chooses two kinds of petrochemical industry wastewater as object of study. One is the mixture of seawater and freshwater and the other is freshwater. In the course of the research, the two kinds of petrochemical wastewater are studied in the laboratory and refinery by using CBDS, and it has got a good result.

在研究过程中，选择了海淡混合水和淡水石油化工废水作为复合生物脱氮的研究对象，利用生物反应器、气相色谱仪、X-射线衍射仪、PCR扩增仪、DNA序列分析仪、电泳仪、扫描电镜和透射电镜等仪器设备，研究了CBDS生物体系和生物载体系统，并确定了石油化工废水复合生物脱氮工艺最佳操作条件。

Anadromous fish were intermediate to marine and freshwater fish (h=0·68 and a=11·3). Results parallel earlier comparatie summaries of allozyme ariation in marine, anadromous, and freshwater fishes and probably are attributable in part to differences in eolutionarily effectie population sizes typifying species inhabiting these realms.

与先前得到的海水鱼类、淡水鱼类、溯河产卵鱼类的等位酶结果相平行，这可能归结于这些栖息在不同水域的种类进化有效群体大小的差异。

The geochemical section of single well shows that the depth influenced by atmogenic freshwater is about 150 meter which is under the Caledonian affiliation plane of the unconformity and at the same time, the freshwater reconstructed the dolomite reservoir which had existed before the former.

单井地球化学剖面说明，大气淡水作用深度主要集中在不整合面之下150m的深度范围，并对先前形成的白云岩储层进行岩溶改造。

As the depth of the standing water in the freshwater marsh increased and cyperaceous plants replaced the gramineous plants, the capacity of plants to transport methane from the freshwater marsh into the atmosphere increased significantly, however the comprehensive effect of plants on methane production decreased.

在腐泥沼泽中，随着沼泽静水层深度的增加，植物种类由禾本科植物——小叶章演替为莎草科植物——乌拉苔草和毛果苔草，植物传输甲烷的能力显著提高，占沼泽甲烷排放总量的比例从31%上升到72%~86%。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。