They decided to divide their 50-square-metre allowance into 23 small plant beds, each containing a sweet gum tree.
他们决定把他们50平方米的限额分为23个小的植物床，每块包含一颗枫香树。
2
Perhaps because of a natural gum in the plant, the layers stuck together.
也许由于植物中有天然胶质，几层粘到一起了。
3
Natural plant polysaccharides mainly include cellulose, starch, pectin and gum etc. The structure of the natural plant polysaccharides and its wide use in the medical field.