It appears that the shell has to crack open or break down somewhat to allow the seed to soak up water.
看来，为了让种子吸收水分，种子的外壳必须裂开或破裂。
On the inside there's a seed with a hard shell.
在这里面有一颗有硬壳的种子。
The soluble protein percentage was lowest in the boll shell and it was highest in the seed of the middle node.
铃壳内可溶性蛋白质含量以中部果枝铃最低，但是中部棉籽内可溶性蛋白质含量均高于上部和下部棉铃。
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