1 sentence

1. 由于生存环境变得恶劣，这支游牧民族决定整体向南方迁移。

   yóu​yú shēng​cún huán​jìng biàn de è​liè, zhè zhī yóu​mù mín​zú jué​dìng zhěng​tǐ xiàng nán​fāng qiān​yí.

   Due to the deteriorating living environment, this nomadic tribe decided to migrate southward as a whole.

   Source: Dong Chinese Dictionary