用拖网把海下都变成了沙漠，当地非洲国家很穷，他们没有力量来保护自己的领海。
Under the sea by trawlers all become desert, local African countries are poor, they have no power to protect their waters.
直到1887年中法谈判确定法国“保护国”越南同中国的领海边界，中国才开始采取措施定界戍边。
It wasn't until an 1887 treaty with France delimiting a sea border with the French protectorate of Tonkin that China began to take any action to demarcate and defend an ocean frontier.
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