That stainless steel band that runs around is the primary structural elements of the phone and there are these three slits in it.

环绕的不锈钢带是这款手机的主要结构元素，上面有三个缺口。

The resulting glucose can then be used for the plant's energy needs or built up into larger molecules like starch and cellulose, the primary structural component of plant cell walls.

由此产生的葡萄糖可用于满足植物的能量需求或形成较大的分子，如淀粉和纤维素，植物细胞壁的主要结构成分。