transaction
n. 交易，买卖，业务；（学术团体会议的）议事录，公报；（人与人之间的）交流，相互影响；事务（元），事项
例句
The transaction is completed by payment of the fee.
交易在支付费用之后就完成了。
《柯林斯英汉双解大词典》
Neither side would disclose details of the transaction.
双方都不会透露交易的细节。
The new device can also cancel the cheque after the transaction is complete.
这种新设备还能在交易结束后将支票注销。
