There was reason to hope, then, that no accident would mark the journey through this difficult country.

人们于是可以指望通过这个困难的山区而不发生任何意外了。

We've launched 433 new vaccines in the most difficult countries in the world, in the Somalias and Yemens and DRCs and Nigerias.

我们已经在世界上最困难的国家推出了 433 种新疫苗，包括索马里、也门、刚果民主共和国和尼日利亚。

Since I was very young, I dreamed of working for the United Nations in some of the most difficult countries in the world.

从很小的时候起，我就梦想在世界上一些最困难的国家为联合国工作。

But if it goes well, this could be something significant, something that no other U.S. president has ever done before, normalizing relations with North Korea, one of the most secretive and perhaps difficult countries to deal with on earth.

但如果进展顺利的话，这可能是很重要的，这是美国总统从未做过的事情，与朝鲜关系正常化，朝鲜这是世界上最神秘、最困难的国家之一。