I had to find a way to grind the corn into flour, but the rocks on the island were not hard enough.
我必须想办法把玉米磨成面粉，但岛上的岩石不够坚硬。
2
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。
3
Use a coffee grinder to grind the sheets into a powder.