名词
中文翻译：前线
同义词：
['front line', 'forefront', 'vanguard']
例句：
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1. The soldiers were fighting on the most dangerous part of the battlefield.
士兵们在战斗的最危险部分作战。
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2. The company was at the forefront of technological innovation.
该公司是技术创新的前沿。
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3. The new policy is aimed at improving the efficiency of the most crucial sectors.
新政策旨在提高最关键的部门的效率。