名词
中文翻译：Unknown
同义词：
['principal horizon', 'principle line', 'principle boundary']
例句：
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1.The principle horizon of the project is clear and unambiguous.
项目的基本原则是明确且不含糊的。
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2. The principle horizon of environmental protection is to reduce pollution.
环境保护的原则是减少污染。
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3. The principle horizon of education is to cultivate students' comprehensive qualities.
教育的原则是培养学生的综合素质。