dynamic middle-layer的用法和樣例：
例句
- The next layer in the atmosphere is the thermosphere named for its high temperature.
中間層頂后是熱成層，它是因為這里的高溫而得名的。 - Cell-wall polysaccharides and pectic substances contained in the vesicles eontribute to growth of the new wall and middle lamella inside the sac.
小泡中所含的細胞壁多糖和果膠狀物質(zhì)對新細胞壁的生長(cháng)和囊泡中間層的形成有重要的作用。
