Fish were a vital commodity in growing towns and cities, where food supplies were a constant concern.
在不断发展的城镇和城市里，鱼是一种重要的商品，那里的食物供应一直是人们关注的问题。
He says his studies of Australian native fish show fish were intelligent creatures that know how to avoid enemies and catch food like any other animal.
他说，他对澳大利亚本土鱼类的研究表明，鱼是一种聪明的生物，像其他动物一样知道如何躲避敌人和捕捉食物。
The fish were placed in a tank with two feeders, one of which supplied a lot more food than the other, known as the "rich feeder".
这些鱼被安置在一个有两个喂食器的鱼缸里，其中一个喂食器提供的食物比另一个多得多，被称为“富庶喂食器”。
A huge variety of fish, including cod, bream, mussels, salmon and sturgeon, is being farmed, providing food for people all over the world.
非常多的鱼类已被养殖，包括鳕鱼、鲤科鱼、贻贝、鲑鱼和鲟鱼，为世界各地的人们提供了食物。
The low-carbohydrate food movement gave birth to such diets as the Atkins, Paleo and Keto, which advised swapping foods like bread, pasta and potatoes for vegetables, fish and meat.
低碳水化合物饮食运动催生了阿特金斯饮食法、旧石器饮食法和生酮饮食法等饮食方法，这些饮食方法建议将面包、意大利面和土豆等食物换成蔬菜、鱼和肉。
I, in the rain gear, rubber boots, and knee-pads, am trying not to slip on the shiny, slick kelp and end up as fish food.
我穿着雨具，橡胶靴，戴着护膝，正尽量避免踩到亮晶晶滑腻腻的海藻而滑倒，免得最后成了鱼食。
The cheapest food is fish and chips.
最便宜的食物是炸鱼薯条。
Fish are often in danger when they look for food.
鱼在寻找食物时往往处于危险之中。
They found that after such a long break the fish still went to the same place where they first got food.
他们发现，这么长时间之后，鱼还是会游到它们第一次获得食物的地方。
My own fish become very excited when my hand appears near their tank, even before I drop the food in.
每当我的手出现在鱼缸附近时，甚至食物还没扔进去，我的鱼就变得非常兴奋。
If fish are able to remember that a certain area contains (容纳) safe food, they will be able to go back to that area without putting their lives in danger.
如果鱼能够记住在某一地方有安全的食物，它们将能够回到那个地方，不会将自己置于危险之境。
In the study, researchers from Mac Ewan University in Canada trained a kind of fish called African cichlids to go to a certain area of their tank to get food.
在这项研究中，加拿大麦科文大学的研究人员训练了一种叫做非洲慈鲷的鱼，让它们游到鱼缸的特定区域获取食物。
Nutrients in the wastewater support the fish, so no external food is added.
废水中的营养物质可喂养鱼类，因此没必要加额外食物。
Then the truck will head off to a processing plant, where the fish will become food.
然后卡车将驶向加工厂，在那里鱼将被加工成食品。
Often, the fish escape and compete with native fish for food, leading to declines in native populations.
这类鱼经常在逃跑后和当地的鱼群争抢食物，因此导致当地鱼群的数量减少。
At first I thought this might prove a blessing in disguise, and at once proceeded to make inquiries for food: flesh, fish or vegetable, hot or cold, anything!
开初，我还以为这也许会因祸得福，我一进旅馆门，就问有什么食物可吃，肉啊、鱼啊、蔬菜、热的冷的都行！
Barely visible without a microscope, rotifers eat algae and serve primarily as food for baby fish.
不借助显微镜的话几乎看不见，轮虫以藻类为食而轮虫又是鱼宝宝们的主食。
Some excellent food choices include fish (especially anchovies, mackerel and wild salmon) and dark leafy green vegetables.
鱼(特别是沙丁鱼，大鱼和野生鲑鱼)，还有那些墨绿色的蔬菜。
Now there is no mud, and no food for the fish — they've left us.
现在泥沙没有了，鱼没有可吃的了，也就不来了。
In the hopefully not too distant future, the RFID chip will be embedded in the fish food container already.
希望在不久的将来，射频芯片会内置在鱼食罐儿里。
The first brain food is fish. With its omega 3 fatty acids fish is essential for brain function and development.
第一种有利于大脑的食物是鱼类。
Seaweed farms would serve two main purposes: habitat and food for fish; and as "' nutrient sinks' that would take up inorganic nutrients (ammonia, nitrate, phosphate) from the water column."
建造海藻农场有两大作用：它可作为鱼类的栖息地与饲料，还可作为“养料汇集处”，从水柱中吸收无机养分(氨，硝酸盐，磷酸盐)。
In 2007, more than 113 million tonnes of food fish were supplied by capture fisheries and aquaculture globally, providing an estimated 17 kg per capita.
2007年，全球有超过1.13亿吨的食用鱼由渔业捕捞和水产养殖部门提供，约每人17公斤。
They then placed a mussel in to see how the fish competed for food.
科学家们向水中投入贻贝，来观察食人鱼是如何争夺食物的。
Contests that are designed to select winners based on popular votes only and huge dollar amounts inspire scarcity thinking. Much like throwing some fish food into a pond filled with starving Coi fish.
诸多比赛被设计成仅基于大众投票来选择优胜者，并且花费大量金钱来激发稀缺性思想，这些比赛如同扔些鱼食到挤满饥饿的鲑鱼池塘一样。
The fish content of salmon food has been reduced from 70% in 1972 to around 20% today, says Kjell Bjordal, the head of Ewos, a Norwegian fish-food company.
谢尔•比尤达尔（KjellBjordal）是一家挪威鱼饲料公司Ewos的老板，他介绍说，鲑鱼食料中鱼所占的比例已经由1972年的70％下降到目前的20％左右。
The science, art, and business of cultivating Marine or freshwater food fish or shellfish, such as oysters, clams, salmon, and trout, under controlled conditions.
水产养殖在控制条件下，科学、艺术及商业性培植海水或淡水食用鱼或介壳类，如牡蛎、蛤、鲑及鳟鱼。
The science, art, and business of cultivating Marine or freshwater food fish or shellfish, such as oysters, clams, salmon, and trout, under control led conditions.
水产养殖在控制条件下，科学、艺术及商业性培植海水或淡水食用鱼或介壳类，如牡蛎、蛤、鲑及鳟鱼。
The science, art, and business of cultivating Marine or freshwater food fish or shellfish, such as oysters, clams, salmon, and trout, under control led conditions.
水产养殖在控制条件下，科学、艺术及商业性培植海水或淡水食用鱼或介壳类，如牡蛎、蛤、鲑及鳟鱼。
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