Exodermis An outermost layer of thickened or suberized cortical cells that sometimes replaces the epidermal layer in the older parts of roots if the epidermal cells have died.
薄
或木栓化

细胞
最外
。如果根
较

表
细胞死亡,它通常取而代之。
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7) When we drift off, the areas of our brain that control motor function are inactivated in favor of those that control our sleep cycles, which is why you can dream about riding your bike without actually moving your feet.
当我们昏昏欲睡时,我们大脑中控制运动功能的区域会没有活力、那些控制我们睡眠周期的区域取而代之发挥作用。这就
为什么即使没有真的动你的退,你仍会梦到骑自行车。