1·To solicit offers from providers, the best-price purchase process relies on an Invitation to Bid (ITB), also known as Invitation to tender (ITT), Invitation for Bids (IFB), or Sealed Bids.
为了从供应商那招徕报价，最佳价格采购过程取决于招标邀请书，也被叫做投标邀请函，投标邀请书或密封投标。
2·The tenderers are mainly national excellent image design organizations, and also a group of designers full of passion. This tender invitation was a new challenge for this project.
投标单位以全国优秀的形象设计策划机构为主，更不乏一群满腔热血和激情的设计师，这次招标是对此项专业设计一次新的挑战。