Four fins on the bot, inspired by surgeonfish, allowed for precise vertical and horizontal movement.

受刺尾鱼启发，机器人上的四个鳍允许精确的垂直和水平运动。

Then she grated it on the bot- tom of the old, leaky tin pan that Pa had punched full of nail-holes for her.

然后她把它磨碎在爸爸给她钉满钉孔的漏水的旧锡锅底部。