固沙

gù shā zào lín

固沙造林

dune-fixing afforestation

zhí shù néng gòu gù shā

植树能够固沙。

Trees help to fix sand.

tā men zài shā mò dì qū zhòng zhí shù mù yǐ cǐ gù shā bǎo hù huán jìng

他们在沙漠地区种植树木，以此固沙、保护环境。

They plant trees in the desert area to keep the sand and protect the environment.