O Dicionário Russo-Inglês: a edição americana.

• Сontains 50,949 words and phrases.
• Selection of vocabulary, presentation of pronunciation peculiarities, grammar and spelling reflect the American variant of conversational English widely used in different areas of contemporary life.

быть на седьмом небе от счастья

be/sit on top of the world, be in the seventh heaven, be on cloud nine разг