That is because of the treaty which we have made. On forming our little Holy Alliance we assigned ourselves each our frontier, which we never cross.

这是因为我们有这样一条规定，在组织我们这个小小神圣同盟时，我们便划定了边界，互不侵犯。

youdao

Under the Treaty of Rome, however, the European Union has behaved as if the Med were a frontier, rather than an organising principle.

然而在罗马条约下，地中海在欧盟仅似一个边缘地带，而不是主要组成部分。

youdao

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.

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。

youdao

The treaty's design for a frontier-free Europe, it seems, comes with a self-destruct button.

ECONOMIST: Immigration

Whatever steps are taken, or probably not taken, the key task remains that set out in Ehud Yaari's January report, as he put it, "to minimise the risk of the Israeli-Egyptian peace treaty imploding under the pressures of the wild Sinai frontier".

BBC: Sinai attack marks step change in border violence