exudation of resin

例句：

1. 1. The tree's bark is covered in a thick layer of resin exudation.
   这棵树的树皮上覆盖着一层厚厚的树脂渗出。
2. 2.The worker carefully removed the resin exudation from the surface of the wood.
   工人小心翼翼地从木头的表面移除了树脂渗出。
3. 3.The study found that certain species of fungi produce resin exudation that can be used for various purposes.
   研究发现，某些真菌产生的树脂渗出物可以用于各种用途。