Leaving the doors unlocked is an open invitation to burglars.
出门不上锁无异于开门揖盗。
She had wangled an invitation to the opening night.
她弄到了一张首映之夜的请柬。
Admission is by invitation only.
凭请柬入场。
I accepted the invitation thankfully.
我愉快地接受了邀请。
She graciously accepted our invitation.
她落落大方地接受了我们的邀请。