secondary activity

With the progressive development of stem, the activity of vascular cambium began. The fascicular cambium differentiated into secondary xylem and secondary phloem, while the interfascicular cambium only differentiated into wide ray of parenchyma tissue.

随着茎的继续发育，维管形成层开始活动，由束中形成层产生次生韧皮部和次生木质部分子；而束间形成层仅产生薄壁细胞组成宽的射线。

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The research content included the renewal of secondary fiber's activity, the effective removal of gluey materials and the bleaching of high-kappa number pulp made of secondary fiber.

研究内容包括：二次纤维活性的恢复、胶粘物的有效去除以及高硬度二次纤维纸浆的漂白。

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Conclusion somatic stimuli can evoke significant activations in bilateral primary and secondary somatic cortex. THE INFLUENCE OF NOXIOUS STIMULATION ON SOMATOSENSORY CORTICAL UNIT ACTIVITY AND THE EFFECT OF ACUPUNCTURE

结论体感刺激激活两侧第一、第二躯体感觉皮层。伤害性刺激对躯体感觉皮层单位放电的影响及电针效应

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The primary xylem of root is diarch, of which developmental process contains primary growth and secondary growth. Secondary growth mainly depends on the activity of the vascular cambium and cork cambium.

其根为二原型，发育过程可分为初生生长和次生生长，成熟根的结构以次生结构为主，次生生长主要依靠维管形成层和木栓形成层的活动来完成。

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The present results indicated the remarkable impact of salt stress on cambium cell activity and secondary xylem cell differentiation of both root and stem.

显微结构观测表明，盐胁迫对根和茎形成层细胞的活动和次生韧皮部和木质部细胞的分化产生显著影响。

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