邀请函是我们时常会用到的商业文书，你知道邀请函英语怎么说吗？看看下面吧！
invitation
参考例句：
Entry to this competition is by invitation only.
此次竞赛的参赛只凭邀请函。Nobody in the office had received an invitation to the party.
在办公室里没有人收到邀请函去参加这个宴会。invitation是什么意思：
n. 邀请；请柬；引诱
Whomever you invite will be welcome.
你邀请的`任何人都将受欢迎。 He was upset at not being invited.
人家没邀请他，他很不痛快. A Bad padlock invites a picklock
坏锁招人撬Entry to this competition is by invitation only.
此次竞赛的参赛只凭邀请函。She was favored with an invitation.
她受到了邀请。
