介词短语
中文翻译：在
同义词：
['before', 'in front of']
例句：
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1.He walked ahead of his friends to the finish line.
他走在朋友们前面到达终点线。
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2.She sat ahead of me in the classroom.
她在教室里坐在我前面。
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3. The car was ahead of us when we arrived at the traffic light.
当我们到达红绿灯时，汽车在我们前面。