"No other instance is known among fishes of a species requiring a quarter of the circumference of the globe to complete its life history, " he wrote in 1923.
已知鱼类中没有任何其它一种需要跨越地球四分之一路程去完成生命的历程。
In all cases the spacing must be uniform for the complete pipe circumference.
在任何情况下，管子整个圆周上的间隙必须均匀。
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