紫菜和海带,小朋友们一定不陌生,因为我们常常吃它们,但它们是怎么生长的呢?紫菜是海洋中的植物,全身上下紫中带黑,一片片像半透明的大叶子,薄得像一张玻璃纸,它很容易受环境的影响,当海水深浅不同或 Seaweed and kelp, children must be familiar, because we often eat them, but how do they grow? Seaweed is a plant in the ocean, the whole body with purple in black, a piece of translucent like a big leaf, thin like A piece of cellophane, it is easily affected by the environment, when the depth of the sea or different