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1·The default rule representation provides a concise syntactic and semantic formalism for potential causal relations to be used in causal reasoning models such as predicting, explaining and diagnosing.

因果关系的默认规则表达为潜在的因果关系提供了一个简洁的语法与语义形式化工具，使得因果关系能够应用在因果推理模型中，比如预浙江大学博士学位论文。

2·The question that arises is whether the application of third tone sandhi rule is conditioned by syntactic factor or prosodic factor.

由此就产生了这样一个问题：上声变调规则的应用是取决于句法因素还是韵律因素。

3·And I prove the formal axiomatic system of prepositional logic that is made up of axiomatic Mode and the Rule of Detachment does not possess syntactic perfectibility.

证明：由公理模式和分离规则构成的命题逻辑公理系统不具有语法完全性。

4·It has a number of distinctive features in its phonological, morphological and syntactic systems which are rule-governed and systematic.

它在音系、形态和句法体系中也有许多甄别特征，而且这些特征也是系统的、由一定规则所制约的。