流域

长江流域不仅是我国重要的水运交通经济黄金水道，更是维系国家水资源生态环境安全的重要战略屏障。

cháng jiāng liú yù bù jǐn shì wǒ guó zhòng yào de shuǐ yùn jiāo tōng jīng jì huáng jīn shuǐ dào, gèng shì wéi xì guó jiā shuǐ zī yuán shēng tài huán jìng ān quán de zhòng yào zhàn lüè píng zhàng.

The Yangtze River Basin is not only my country's important golden waterway for water transportation and economics, but also an important strategic barrier for maintaining the security of the country's water resources and ecological environment.