历史真是无法取消的、残酷的。
由于出现了我们无法控制的情况，飞往罗马的航班已被取消。
Owing to circumstances beyond our control , the flight to Rome has been cancelled.
这意味着业务状态机始终处于两种状态之间，因此无法接受诸如请求取消订单之类的其他操作。
This would mean the business state machine is between states and thus would not be able to accept other operations, such as a request to cancel the order.
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