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1·The parol evidence rule applies to evidence as to the express terms of a contract are.

口头证据规则适用于确定合同的明示条款的证据。

2·The parol evidence rule only prevents a party from relying on extrinsic evidence as to the express terms of a written contract.

口头证据规则仅阻止当事人以外在证据对抗书面合同的明示条款。

3·The parol evidence rule only prevents a party from relying on extrinsic evidence as to the express terms of a written contract .

口头证据规则仅阻止当事人以外在证据对抗书面合同的明示条款。

4·The parol evidence rule only applies to evidence of statements made before or at the time of the execution of the written contract.

口头证据规则仅适应于在书面合同履行之前或履行之时作出的陈述。