Welcome to the Voice of America's “News Words”.
欢迎收听美国之音“新闻词汇”。
Listen to President Barack Obama speaking about NATO and the Ukraine crisis.
请听奥巴马·巴拉克总统对于北约和乌克兰危机的发言。
As NATO allies, we will meet our solemn duty, our Article 5 obligation to our collective defense.
作为北约盟国，我们要履行我们庄严的使命，即北约协定第五项规定的共同防御义务。
And today I want every Estonian and Latvian and Lithuanian to know that you will never stand alone.
现在我想要每个爱沙尼亚人、拉托维亚人和立陶宛人明白，你们永远不会孤军奋战。
Obligation. An obligation is a promise. It is something one must do because of a law, a rule or because it is morally right.
义务。义务是一项承诺。它是一个人由于法律、规则或道德要求而必须做的事情。
President Obama talks about NATO members' promise to defend each other.
奥巴马总统谈论了北约成员国保护彼此的承诺。

Russia took over part of Ukraine. Now Obama says NATO will help defend the nearby countries.
俄罗斯占领了乌克兰的部分地区。现在奥巴马说北约会帮助保护周围的国家。
Now, the next time you hear the word, obligation, you will know what this News Word means.
现在，下一次你听到单词，“义务”，你就会知道这个新闻词汇的意思了。