英语翻译them in a tank(容器) of water．The tank is made of clear gl

英语翻译
them in a tank(容器) of water．The tank is made of clear glass．People can look through it． They can see inside the tank and watch the fish． The fish need room．They must not be crowded．Fish need oxygen(氧 气) to breathe．Fish get it from water in the tank．There must be enough water for all fish．So the size of the tank is important． In the tank many people put small plants that are good for fish．They give oxygen to the water．Plants help in other ways,too．Fish can nibble(一 点点地吃) on the plants．They hide among the plants and sleep,lay eggs there． The plants need light．Most fish need light．too．The tank may be put near a window．It will get light there．Another place might be better,though．A window may let cold air in．The water in the tank may get too cold．The fish may die because cold water can kill them．So can hot water．The temperature must be just right． The fish must be kept in water all the time．Some fish can jump high． They may jump out of the tank．The tank should be covered．This keeps the fish from jumping out．The fish need food and they should be fed every day．Giving them too much food is bad．The extra food will fall to the bottom and make the water dirty． However,the fish should get just enough food．They should finish the food in 10 minutes．Nothing should be left．when this happens,the amount(数量) of food is right．

很多人以小鱼儿作为宠物饲养,把它们养在鱼缸.鱼缸是由透明玻璃造成的,让人一目了然,能看到在鱼缸内的一切和鱼儿.
鱼儿需要空间,它们不能被拥挤.鱼儿需要氧气呼吸,它们能从缸中的水取得氧气,必须要有足够的水提供给所有的鱼.故此,鱼缸的大小非常重要.
很多人会在鱼缸里放小植物,那对鱼是很好的.植物能在水中释出氧分.在其它方面植物也有帮助.鱼儿可以轻咬植物,它们躲在植物之间、睡觉和产卵.
植物需要光,大多数鱼儿都需要光.鱼缸该放靠近窗户,那里可以摄取阳光.然而,另一处可能会更好,冷空气可能会从窗户吹进来,那在鱼缸中的水就可能会太冷,水太冷或太热都可能会令鱼儿死亡.故此,温度必须恰到好处.
不论任何时间,鱼儿都必须在水中.有些鱼可以跳得很高,它们可能跳出鱼缸,故此鱼缸要有上盖,以妨鱼儿跳出鱼缸.鱼儿需要食物,每天都该给它们餵饲.不要给它们太多食物,剩余的食物会沉落到缸底,使水变脏.然而,鱼儿应该有足够的食物,它们该在10分钟内吃完,一点都不剩.如果情况如此,食物的量就是恰当的.