The more cellulose that gets deposited, the denser that secondary layer becomes — and this determines the strength of the final fiber.

越多纤维素堆积，次生细胞壁就变得更紧实——这决定了最终棉花纤维的强度。

The next crucial stage of the cotton fiber's growth begins as it thickens its secondary cell wall by depositing large quantities of cellulose into the secondary layer.

在下一个棉花纤维成长的关键阶段，大量纤维素在次生细胞壁内堆积并从而强化细胞壁。