英语翻译. 急不要一眼看去就知道是软件翻的Fishery products are the major source o

英语翻译. 急
不要一眼看去就知道是软件翻的
Fishery products are the major source of high quality dietary protein to more than a quarter of the world’s population. Aquatic foods are among the most highly valued and most perishable of all food products. Although people consume only a limited number of species of land animals as sources of muscle food, they consume hundreds of different species of aquatic animals including more than 350 species of Mollusca (e.g., lobsters, crabs, shrimp, and crayfish), holothurians (sea cucumbers) and Chordata (finfish) [National Academy of Sciences (NAS) 2003].
Since 1980, seafood consumption in the United States has increased by 22%, from 12.5 to 15.3 pounds per person [U.S. General Accounting Office (GAO)2001]. Frozen seafood products have also become an important part of the diet, including roughly 2.5 pounds of shrimp per person per year in the United States, as well as 1.7 pounds of Alaska Pollack fillets, and 1.1 pound of cod (Johnson 1998). World commercial fishing fleets and aquaculture produce over 120 million metric tons of seafood annually [Food and Agriculture Organization (FAO) 2002]. None of this would be possible without the availability of economical refrigeration.
International trade in aquatic food products is critical to the balance of trade of many countries, with the United States importing 3.9 billion pounds of aquatic food produces from over 160 different countries, half of this from China, Ecuador, Chile, Canada, and Thailand. Imported seafood constitutes more than half of the seafood consumed in the United States, and much of this product is frozen(GAO 2001), for example roughly 80% of the shrimp consumed in the United States is imported, and most of it is frozen (NAS2003).
So these products can be made widely available, aquatic food products are often refrigerated or frozen. The widespread use of refrigeration, freezing, and cold storage has meant that aquatic food products, normally available only seasonally and within a small region, can now be sent around the world any time of the year. Until quite recently, aquatic foods were primarily harvested and consumed locally.
Improvements in the quality, availability, and price of fresh and frozen fish products, along with cheaper poultry products, have negatively impacted the canned seafood market. (With improved quality and availability of other fresh and frozen foods, a similar negative impact has been seen for other canned products, with the possible exception of tomatoes, which do not freeze well.) The exception to thermally processed products is canned tuna, which is still the most popular fish product, by volume, consumed in the United States, followed closely by frozen shrimp, and salmon in various product forms.

渔业产品的主要来源,高品质的蛋白质超过四分之一的世界人口.水产食品是最高度重视和最易腐烂的所有食品.尽管人们的消费只有数量有限的土地种动物为食物来源的肌肉,他们消费数百种不同种类的水生动物包括超过350种,贝类（如龙虾,螃蟹,虾,龙虾） ,海参（海黄瓜）和门（鳍） [国家科学院（ NAS ）等更高要求2003 ] .
自1980年以来,海鲜消费在美国增加了22 ％ ,从5月12日至一十五点三磅每人[美国总审计局（高） 2001 ] .冷冻海鲜产品也已成为一个重要组成部分,饮食,其中包括大约二点五磅虾每人每年在美国,以及1.7磅的阿拉斯加狭鳕鱼片,并一点一英镑对COD （约翰逊1998年） .世界商业捕鱼船队和水产养殖业的生产超过120万公吨的海产品每年[粮食和农业组织（粮农组织） 2002年] .没有,这是有可能不提供经济制冷.
国际水产品贸易的产品是至关重要的贸易平衡的许多国家,与美国进口三十九点〇 〇亿磅的水产品产量由160多个不同的国家,一半来自中国,厄瓜多尔,智利,加拿大和泰国.进口海鲜构成一半以上的海产品消费量,美国,大部分产品是冷冻（高2001 ） ,例如约80 ％的虾消费量美国是进口的,而且大多数是被冻结（ NAS2003 ） .
因此,这些产品可广泛使用,水产食品往往冷藏或冷冻.广泛使用的冷藏,冷冻,冷藏,这意味着水产食品,通常只能季节性和一个小区域范围内,现在可以被世界各地的任何时间的一年.直到最近,水产食品,主要收获和当地消费.
改进质量,可用性和价格的新鲜和冷冻鱼产品,以及廉价的禽类产品,产生了消极影响罐头海鲜市场. （与提高产品质量和可用性,其他新鲜和冷冻食品,一个类似的负面影响已被其他罐头产品,可能的例外西红柿,不冻结良好. ）的例外热加工产品是金枪鱼罐头,其中仍然是最受欢迎的鱼产品,以体积计,消费在美国,紧随其后的是冷冻虾和鲑鱼产品的各种形式.