He was happy to receive an invitation letter from the university inviting him to the alumni event.

他很高兴收到大学的邀请信，邀请他参加校友会。

If you receive an invitation card it means that someone specifically wants YOU to attend the event.

接到请柬，就意味着别人特别想让你参加。

It is important for guests to respond quickly when they receive an invitation, and it's best to respond within a week.

当客户收到约请函的时间，敏锐的做出复兴是一种规矩，通常来讲最好是在一个星期内赐与复兴。