名词
中文翻译：上阶段基础
同义词：
['advanced stage base', 'advanced stage foundation']
例句：
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1. The research teamis working on developing an upper-stage base for the new project.
研究团队正在开发新项目的高级阶段基础。
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2.The company has established a strong upper-stage base in the international market.
该公司在国际市场上建立了坚实的高级阶段基础。
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3. The students are expected to have a solid upper-stage base in mathematics before they enter university.
学生们在进入大学之前应该具备坚实的数学高级阶段基础。