invitation 
英 [ˌɪnvɪˈteɪʃən]  美 [ˌɪnvəˈteɪʃən] 
n. 邀请；请柬；引诱

例句：
I accepted the invitation. 

我接受了邀请。

Hundreds of invitations are being sent out this week. 

数百封请柬将在本周寄出。

The dinner is by invitation only. 

晚宴仅限受邀者参加。

He's understood to be there at the personal invitation of the President. 

据了解他是应总统亲自邀请而到场的。

Leaving your shopping on the back seat is an invitation to a thief. 

把买来的东西放在后座上会招来小偷。