The spleen and head kidney are the major hemopoietic organs in fish.

鱼类脾脏、头肾是机体造血的主要器官。

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Take your lower kidney toward the floor and also toward your head.

让你的肾的下部向着地板的方向也向着头的方向。

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Take your lower kidney toward the floor and also toward your head.

让你的肾的下部向着地板的方向也向着头的方向。

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