Tugboats are used to maneuver, primarily by towing or pushing, other vessels in harbors, over the open sea or through rivers and canals.

拖船通常通过拖或推来移动海港、远海、河流或运河中其他的船。

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Tugboats are used to maneuver, primarily by towing or pushing, other vessels in harbors, over the open sea or through rivers and canals.

拖船通常通过拖或推来移动海港、远海、河流或运河中其他的船。

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