本周的会谈将会开启美伊30年来首次正式，直接的谈判。
This week's talks open the first formal, direct negotiations between America and Iran in 30 years.
我们期待着卡梅伦首相今年晚些时候对中国的首次正式访问。
We look forward to Prime Minister Cameron's first official visit to China later this year.
当美国在2001年9月遭遇攻击的时候，北约首次正式援引第五款。
When America was attacked in September 2001, NATO formally invoked Article 5 for the first time.
应用推荐