如果由于战争、洪水、火灾、地震、雪灾、暴风的原因致使卖方不能按时履行义务时，卖方可以推迟这些义务的履行时间，或者撤销部分或全部合同。

IF the shipment of the contracted goods is delayed by reason of war, flood, fire, earthquake, heavy snow and storm, the seller can delay to fulfill, or revoke part or the whole contract.

youdao

几个世纪前，人们用“成了”表示“全部付清”的意思。官吏会在税单收据上写“成了”，表示债主已完全履行义务。

Centuries ago "Paid in Full" was expressed as "It is Finished." Officials wrote that phrase across tax receipts to declare that the debtor had completely fulfilled his obligation.

youdao