名词: invitation

n. 邀请；引诱；请帖；邀请函

I extended an invitation to my cousin.

我向表弟发出邀请。

She did not accept my invitation.

她没有接受我的请求。

You can't come in without an invitation.

没有邀请函你不能进来。

Please come to our wedding, here's the invitation.

请参加我们的婚礼，这是请柬。