Non-firm offers are not final, often with such words as "subject to prior sale" or " subject to our final confirmation".
虚盘不是最终的，经常会有这样的语句“以先售为准”或“须经我方最后确认”。
2
The Seller's offers are subject to confirmation and are non-binding unless they are expressly stated to be binding.
卖方的要约须得到确认否则并无约束力，除非明确表示受其约束。
3
The object-oriented technology is one non-formalized modelling method, lacks the effective analysis and the confirmation method after the modelling system.