A:I'm sorry, but I can't find the book you lent me. I guess I have lost it.
很抱歉,我找不到你借給我的那本書了。我想我是給丟了。
B:Don't worry about it.
別擔心了。
A:I really feel bad about it. Let me buy you a new one.
對此我真的很抱教。讓我再給你買本新的吧。
B:No. Don't be silly. I wouldn't dream of letting you do that.
不用了,別這么傻。我不會讓你那么做的。