英文会议邀请函邮件主题
    1. "Invitation to [Event/Conference Name]"
    2. "Save the Date: [Event/Conference Name]"
    3. "You're Invited: [Event/Conference Name]"
    4. "Join Us for [Event/Conference Name]"
    5. "Special Invitation: [Event/Conference Name]"
邀请函 英文    6. "Exclusive Event: [Event/Conference Name]"
    7. "Your Presence Requested at [Event/Conference Name]"
    8. "Registration Now Open for [Event/Conference Name]"
    9. "Attend [Event/Conference Name]: Register Today"
    10. "Don't Miss Out: [Event/Conference Name]"
    以上这些主题都能够清晰地传达出会议邀请的内容，同时吸引收件人打开邮件并阅读详细信息。选择合适的主题取决于会议的性质和受众体，但无论如何，主题应该简洁明了，让收件人一目了然。