英文邀请函一般正式的文体前面都不空格，且段落间是要空一行的。格式如下：Dear sir/madam: I'm delighted you have accepted our invitation to speak at the Conference in [city] on [date]. As we agreed, you'll be speaking on the topic "" from [time] to [time]. There will be an additional minutes for questions. Would you please tell me what kind of audio-visual equipm...
