1 sentence

1. 他们的作用是帮助将死树变成有价值的有机物。

   tā​men de zuò​yòng shì bāng​zhù jiāng sǐ shù biàn​chéng yǒu​jià​zhí de yǒu​jī​wù.

   Their role is to help turn dead trees into valuable organic matter.

   Source: CCMatrix