Sequential rules provide declarative rules executed sequentially.

顺序规则提供顺序执行的声明性规则。

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But if I use Declarative Rules in condition, then it does not work.

但是，如果我使用声明性规则的条件，那么它不工作。

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For example, some problems lend themselves to more succinct expression as a state machine than as a set of declarative rules.

比如，有些问题使用状态机比使用声明性规则具有更加简洁的表述。

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