梅琳达基金会说，存钱靠本身是不够的。

Melinda Gates says saving by itself isn't enough.

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滚筒线按一定角度倾斜固定在货架横梁上，托盘从高端放入，沿滚筒线靠本身重力下滑。

Drum line at a certain Angle of inclination fixed to the shelf beam, the tray from the high-placed, along the drum line from their own gravity down.

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凝结水靠本身重力流入平衡罐，通过自动控制的排水阀，保持罐内的一定水位，形成水封。

Solidified water flows into balance jar upon itself gravity. Keeping certain water level in the jar through an automatic controlled discharge valve, which forms a water seal.

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