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例句：

1. 1. The boatman was rowing across the river.
   船夫正在划船过河。
2. 2. He rowed his boat to the other side of the lake.
   他划船到了湖的另一边。
3. 3. The boatman had to row back to the shore in the strong current.
   船夫不得不在强劲的水流中划回岸边。