The next layer in the atmosphere is the thermosphere named for its high temperature. 中间层顶后是热成层，它是因为这里的高温而得名的。
Cell-wall polysaccharides and pectic substances contained in the vesicles eontribute to growth of the new wall and middle lamella inside the sac. 小泡中所含的细胞壁多糖和果胶状物质对新细胞壁的生长和囊泡中间层的形成有重要的作用。
