中方政策底牌是非常清楚的，那就是坚决捍卫国家的主权安全和海洋权益，坚决维护地区的和平与稳定。

The bottom line of China's policy is very clear: we will resolutely safeguard our national sovereignty, security and maritime rights and interests, and firmly safeguard regional peace and stability.

youdao

对捍卫国家主权的关注绝不是新话题。

Concern to protect national sovereignty is far from new.

《柯林斯英汉双解大词典》