这家企业控制了产业链上游的关键原材料供应。Zhè jiā qǐyè kòngzhì le chǎnyèliàn shàngyóu de guānjiàn yuáncáiliào gōngyìng.This company controls the supply of key raw materials in the upstream part of the industrial chain.
船逆流而上,终于到了上游的小村庄。Chuán nìliú ér shàng, zhōngyú dàole shàngyóu de xiǎo cūnzhuāng.The boat sailed against the current and finally reached the small village on the upper reaches.
上游的水很干净,我们可以直接喝。Shàngyóu de shuǐ hěn gānjìng, wǒmen kěyǐ zhíjiē hē.The water in the upper reaches is very clean, we can drink it directly.