Only a picket post half a mile out, on the railroad, and a single sentinel at this end of the bridge.

只在半英里以外有一个警戒哨，位于铁道线上，桥的这一端有一名哨兵把守。

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Track your splits per mile for post-run analysis.

为训练之后的分析，记录每英里的配速。

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Track your splits per mile for post-run analysis.

为训练之后的分析，记录每英里的配速。

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