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。
Also, if you go away from your house for awhile in the spring to fall, then you should fill up the tank before you leave. It will slowly evaporate through the loop seal.
此外，如果我们在春季至秋季这一段时期要离开家一段时间，我们应当在离家前将我们太阳能热水器的水箱注满。
The fuel cell taxi can hit a top speed of 81mph, go from 0-60mph in 14 seconds and has a range of more than 250 miles on a full tank of hydrogen.
燃料电池计程车最高时速达81英里，14秒内完成0 – 60迈的提速过程，一满罐氢燃料能跑足250英里。
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