zhè / sōu / xiǎo / chuán / shī / qù / dòng / lì / hòu / zhǐ / néng / yóu / jiù / yuán / chuán / tuō / xíng / huí / gǎng

这艘小船失去动力后，只能由救援船拖行回港。

After losing power, the small boat had to be towed back to the harbor by a rescue vessel.