We were walking in single file to the lake.
我们排成单行走向湖边。
They made their way in single file along the cliff path.
他们一个接着一个沿悬崖小径前进。
They had walked in single file down the path.
他们是一前一后走下小径的。
The children trooped into the yard in single file.
孩子们成一路纵队走进院子。
The sidewalk was so narrow that we had to walk in single file.
人行道太狭窄，我们只好成一列纵队走。
The mourners at the funeral entered the church in single file.
参加葬礼的人们鱼贯进入教堂。
The mourners at the funeral entered the church in single file.
参加葬礼的人们鱼贯进入教堂。
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