invitationn.邀请；邀请函；招待；招致，引诱invitation to bid邀标invitation to send发出邀请, 准许发送invitation issuing发标invitation for bidn.招标；投标邀请函invitational paper特邀报告,特约论文invitation bidding邀请招标invitation to treat邀请投标人做交易invitation to lunch共进午餐的邀请invitation to quote引文invitation for bids招标