They swallow stones, stones that are used to help grind up the food before it's actually digested in the stomach.

它们吞下石头，在食物在胃里消化之前，这些石头被用来帮助磨碎食物。

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Technicians then grind up the leaves to extract the protein.

然后技术人员将研磨树叶，析出蛋白质。

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First the big, accessible parts are removed, along with anything dangerous, and then heavy-duty shredders grind up the remainder into tiny pieces that can be sorted by standard recycling equipment.

首先拆下大的、可利用的和危险部分，然后重型粉碎机将其余部分磨碎，回收设备再按标准分类回收。

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