每个国家都有权维护自己的主权。

Měi gè guójiā dōu yǒu quán wéihù zìjǐ de zhǔquán.

Every country has the right to safeguard its own sovereignty.

主权问题不容谈判，这是我们的底线。

Zhǔquán wèntí bùróng tánpàn, zhè shì wǒmen de dǐxiàn.

Sovereignty is not up for negotiation — that is our bottom line.

这场争端涉及领土主权，情况非常复杂。

Zhè chǎng zhēngduān shèjí lǐngtǔ zhǔquán, qíngkuàng fēicháng fùzá.

This dispute involves territorial sovereignty, and the situation is very complicated.