Tuna swim at a steady rate of nine miles per hour for an indefinite period of time-and they never stop moving. Estimates indicate that a fifteen-year-old tuna must have traveled one million miles in its lifetime.

　　金枪鱼总是以每小时9英里的均恒速度无限地在游动----他们从不停下来。据估计一条15岁的金枪鱼一生中游程达100万英里。


　　The lungfish can live out of water in a state of suspended animation for three years.

　　肺鱼离水后以暂不活动的状态可存活3年。

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