信以为真to believe to be true
这是当真吗？
Is this really true?
你别当真。
Don't take it seriously.
确实really
他当真几夜没睡。
He really didn't sleep for several nights.
你当真见过他吗？
Really? You've seen him?
汉译英翻译词典收录86165条汉英翻译词条，基本涵盖了全部常用中文字词的英语拼写、翻译、音标、读音、用法、例句等，是英语学习的有利工具。