You're always looking for an alternative flow of events.
你一直在寻找替代的事件流。
We should certainly not expect the alternative flow of events to be exhaustive.
我们当然不应该期望另一种事件流是无移漏的。
Generic sequence diagrams make use of conditional logic, which can be useful for describing the alternative flow of events over the course of an interaction.
常规序列图利用了条件逻辑，这对于描述交互过程中事件的可选流程来说很有用处。
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