[] an invitation (to sth/to do sth)a spoken or written request to sb to do sth or to go somewhere （口头或书面的）邀请◆an invitation to a product demonstration 产品展示邀请函◆He accepted the invitation to join the board. 他接受了加入董事会的邀请。⨁to extend / issue / withdraw an invitation 提出／发出／撤回邀请⨁to accept / decline / turn down / reject an invitation 接受／婉拒／回绝／拒绝邀请