(I'm) sorry to hear that. 听到这事我很难过。 That's unfortunate. 真不走运! It happens! 常有的事。 It's a common mistake. 这是常见的错误。 It must be tough for you. 那你肯定很难受吧。 Oh, poor thing! 啊,真可怜! I know how you feel. 我理解你的心情。 Never mind. 别在意。 What bad luck. 太遗憾了。 That's all right. 没事儿。 Don't blame yourself. 别责备自己了。 It's not your fault. 这不是你的错。 It happens. 常有的事。