With the function of d f/ d t slip,it is mainly used in the relay protection test instrument as its digital amplitude and phase modulated voltatge source.
该滑差源具有df/dt频率滑差功能,主要用于继电保护频率滑差试验仪的核心部件数字调幅调相滑频电压源。
Studies on Genetic Diversity of Three Species Bottom-dwelling Fish in Nanjishan Water in Poyang Lake;
鄱阳湖南矶山水域三种底栖鱼类遗传多样性研究
demersal stocks
底(层)鱼(类)(种群)
marine eellike mostly bottom-dwelling fishes of northern seas.
北部海洋中大多数底栖的似鳗海鱼。
pallid bottom-dwelling flat-headed fish with large eyes and a duck-like snout.
暗白色的底栖大头鱼，大眼，嘴巴象鸭子。
bottom-livers having large eyes with metallic green luster.
大眼睛会发金属般绿光的底栖鱼。
"Birds, fish, and amphibians are "oviparous"."
鸟类、鱼和栖类是"卵生"的动物。
Birds, fish, and amphibians are"oviparious".
鸟类、鱼和两栖类是“卵生”的动物。
Birds, fish, and amphibians are "oviparous".
鸟类、鱼和栖类是“卵生”的动物。
"Slow-moving bottom-dwellers, they feed on fishes and invertebrates. They range in length from less than 1 ft (30 cm) to about 6 ft (1.8 m) "
活动缓慢,底栖,以鱼类及无脊椎动物为食。长约1呎(30公分)～6呎(1.8公尺)。
Environmental Organisms Investigation and Environmental quality Assessment of ChangJiang Water Intakes, the Second Water Source of Shanghai--Benthos, Fish and Residual Toxicitv in Organisms.
上海市第二水源长江取水口环境生物调查和质量评价(Ⅱ.底栖生物、鱼类和生物残毒)
fishes; amphibians; reptiles; birds; mammals.
鱼类；两栖动物类；爬虫类；鸟类；哺乳动物类。
The population of birds has increased, groups of animals have returned to their habitats, and there is migration of some species of fish that had disappeared for many years
鸟类增加，兽群返栖，鱼儿洄游
Fish Habitat Modeling in the East China Sea:A Case of Chub Mackerel
鱼类栖息地模拟的比较研究—以东海鲐鱼为例
eellike Atlantic bottom fish with large almost vertical mouth.
大西洋似鳗的底栖鱼，大嘴巴几乎呈垂直方向。
bottom-dwelling fish having scaleless slimy skin and a broad thick head with a wide mouth.
头宽而扁平、嘴很宽、体表有粘液但无鳞的底栖鱼。
bottom-dwelling marine warm-water fishes with two barbels on the chin.
温暖水域中下巴上长有两根触须的底栖海洋鱼。
small bottom-dwelling fish of warm seas having a compressed body and a long snout with a toothless mouth.
温暖海洋的底栖小鱼，特征身体扁平，口鼻长，无牙。
Ecology of Benthic Meiofauna in the Spawning Ground of Anchovy in the Southern Yellow Sea, China;
南黄海鳀鱼产卵场小型底栖动物生态学研究