Unwritten constitution
美 [ˌʌnˈrɪtn ˌkɑːnstɪˈtuːʃn]英 [ˌʌnˈrɪtn ˌkɒnstɪˈtjuːʃn]
- n.不成文宪法

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The clarifying the characteristics of formation and forms of unwritten constitution is the basis for distinguishing the written and unwritten constitutions .
以两类不同宪法类型的特征为标准,就能够对不成文宪法国家类型形成较为清晰的判断。
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Britain has an unwritten constitution , and the United States has a written constitution .
英国有不成文的宪法,美国有成文的宪法。