信函写作的7C原则 — 国际贸易填空题
题目
某业务员起草的订单确认函中写道："We are pleased to inform you that the goods you ordered from us sometime in the recent past have been shipped to you on a certain date by a suitable vessel."该信函未能写明订购货品的具体数量、装运日期与船名，主要违背了7C原则中的____；同时句子冗长啰嗦，违背了____。