epiphytism

例句：

1. 1. Epiphytism is a condition where a plant grows on another plant's stem or branch.
   外生植物是一种状况，其中一种植物生长在另一种植物的茎或枝上。
2. 2.Epiphytes are often found in tropical rainforests and can be difficult to study because they grow on other plants.
   外生植物通常发现在热带雨林中，并且因为它们生长在其他植物上，所以很难研究。
3. 3. The epiphytism of the plant was due to its ability to absorb nutrients from the soil.
   这种植物的外生现象是由于它从土壤中吸收养分的能力。