研究淡水鱼精巢中的核蛋白和鱼精蛋白的提取工艺。
The extraction process of nucleoprotein and protamine from freshwater fish spermary was studied.
它是一种中国白鲟，被誉为“全国淡水鱼之王”。
It's a Chinese paddlefish known as "king of all national freshwater fish".
《整体环境科学》的一篇论文显示，中国最大的淡水鱼可能已经在2005年至2010年间灭绝了。2019年9月，该论文的作者危起伟表示，一些专家认为这种一级保护鱼类已经灭绝。
A paper from Science of the Total Environment shows that the largest freshwater fish in China might have gone extinct between 2005 and 2010. Wei Qiwei, author of the paper, said in September, 2019, some experts supposed that the first-class protected fish had been extinct already.
这些鱼类分为4个主要生态类型，包括河口性鱼类、近海鱼类、江海洄游型鱼类和淡水鱼类。
These fish could be categorized into four types, including estuarine fishes, marine fishes, diadromous fishes and of freshwater fishes.
我会带你们去钓淡水鱼。
淡水鱼数量急剧下滑。
这篇文章讲的是一些淡水鱼的情况。
水说：别傻了，你只是一条淡水鱼。
类似于斜齿鳊的欧洲淡水鱼。
食蚊鱼是淡水鱼，以蚊子幼虫为食，高度的群体化。
Mosquitofish, freshwater fish with a taste for mosquito larvae, are highly social.
监测淡水鱼价格微幅波动。
世界十大大型淡水鱼中有四种会迁移至湄公河产卵。
Four of the world's 10 biggest freshwater fish migrate up the Mekong to spawn.
蓝鲶是北美最大的鲶鱼，同时也是美国最大的淡水鱼之一。
The blue catfish is North America's largest catfish species and it is one of the largest freshwater fish in the u.
蓝鲶是北美最大的鲶鱼，同时也是美国最大的淡水鱼之一。
The blue catfish is North America's largest catfish species and it is one of the largest freshwater fish in the U.S..
一些诸如梭鱼等淡水鱼可以抵御相当程度的酸性。
Some freshwater fishes such as pike can withstand levels of acidity.
很典型的例子，淡水鱼放在在盐水中，或者咸水鱼放在淡水中。
Which is the example of the freshwater fish in salt water, or the saltwater fish in fresh water.
但是，目前国内外关于淡水鱼胰蛋白酶的报道很少。
However, till now, very little information regard trypsins from fresh water fish has been reported.
两栖类的水平衡两栖类的肾功能很像淡水鱼的肾功能。
Amphibian kidneys function much like those of freshwater fishes.
美国和瑞士的科学家研究了非洲湖泊中的棘鳍类热带淡水鱼。
Scientists in the U.S. and Switzerland were studying the cichlids that live in African lakes.
寻遍全世界鳄鱼、鱼和恐龙的杂交后代，鳄雀鳝是美国一种最大的淡水鱼。
Looking for all the world like the cross between an alligator, a fish and dinosaur, the alligator gar is the largest freshwater fish in America.
锯脂鲤属的有着锋利牙齿的水虎鱼是和纳氏锯脂鲤是世界上最残忍的淡水鱼类。
The razor-toothed piranhas of the genera Serrasalmus and Pygocentrus are the most ferocious freshwater fish in the world.
海洋正因温室气体的累积而趋向酸化，而河流湖泊的变暖正影响淡水鱼等生物的生存。
The oceans have become more acidic as a result of the buildup of greenhouse gases, and the warming of rivers and lakes is affecting freshwater fish and other species.
一个世纪以来，全球湿地消失了一半，淡水鱼种类中超过五分之一已经灭绝或濒临灭绝。
Over a fifth of the world's freshwater fish species of a century ago are now endangered or extinct. Half the world's wetlands have also disappeared over the past 100 years.
它是北美体型最大的鲶鱼，并且是北美第三大纯淡水鱼，排在其之前的分别是黄鲟和白鲟。
It is the largest catfish in North America and the third largest obligate freshwater fish in North America, behind the lake sturgeon and paddlefish.
盛产粮、油、茧、生猪、淡水鱼等农产品，是浙江省著名的农副产品生产基地。
Rich in grain, oil, cocoon, live pigs, fresh water fish and other agricultural products, is well-known agricultural production base in Zhejiang Province.
鲤；鲤科鱼鲤科中通常为淡水鱼的一种鱼，其中包括鲤科小鱼、鲤鱼和银色小鱼。
Any of numerous often small freshwater fishes of the family Cyprinidae, which includes the minnows, carps, and shiners.
新几内亚拥有一些最漂亮的淡水鱼，而且这些鱼随处可见。包括暇虎鱼，白杨鱼以及彩虹鱼。
A New Guinea has some of the most beautiful freshwater fishes found anywhere including gobies gudgeons and rainbow fish.
新几内亚拥有一些最漂亮的淡水鱼，而且这些鱼随处可见。包括暇虎鱼，白杨鱼以及彩虹鱼。
A New Guinea has some of the most beautiful freshwater fishes found anywhere including gobies gudgeons and rainbow fish.
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