strengthened

2 篇文章
strengthened to prevent silica in the grass from wearing them out...
Walden 21
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strengthened to prevent silica in the grass from wearing them out... 能够防止草中的二氧化硅磨损牙齿

silica strengthened wearing prevent grass out from in them the to
Lignin strengthened the plants' cell walls...
Walden 21
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15 0 1

Lignin strengthened the plants' cell walls... 木质素加强了植物的细胞壁

plants' strengthened lignin cell walls the
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