validity of the contract

常见例句

This text has decided to research the first problem , namely the validity of the contract.
本文选择了第一个问题进行研究，即合同是否有效的问题。
The failure of the passenger to produce the baggage check, or the irregularity or loss of the baggage check does not affect the existence or validity of the contract of transport.
旅客未能出示行李票?行李票不符合规定或者行李票遗失，不影响运输合同的存在或者有效?。
The failure of the passenger to produce the passenger ticket, or the irregularity or loss of the passenger ticket does not affect the existence or validity of the contract of transport.
旅客未能出示客票、客票不符合规定或者客票遗失，不影响运输合同的存在或者有效。