Human misery knows no frontiers, and nor should human solidarity.

人类的苦难没有国界，人类的团结也应同样不分国界。

youdao

There are no frontiers between the disciplines that man sets himself for understanding and loving.

事实上，这些学科的分类都是为了便于人们的理解和出于热爱而建立的。

youdao

No one knows for sure how serious each of these dangers will be. But one thing they have in common: they do not respect state frontiers.

谁也不能确实知道，这每一种危险到底有多么严重。但是我们知道，这些危险有一个共同点：它们都是不尊重国界的。

youdao

There are no longer any countries shut up in narrow frontiers.

VOA: special.2009.12.31

Where ecological phenomena outlast the political lifetime of decision makers, where the frontiers of Nations are no longer barriers, the principles of harmonisation and inter-governmental collaboration take on their full value.

UNESCO: Troubled Waters

We have always sought out new frontiers and this generation is no different.

WHITEHOUSE: President Obama Pushes Clean Energy

Under no circumstances may foreigners acquire direct ownership of lands or waters within a zone of one hundred kilometers along the frontiers and of fifty kilometers along the shores of the country.

CENTERFORSECURITYPOLICY: Mexico's Glass House