oar blade

例句：

1. 1. The boat's oar blade was sharp enough to cut through the water.
   船的桨叶锋利到能在水中切割。
2. 2. The sailor used his oar blade to push the boat forward.
   水手用他的桨叶推动船前进。
3. 3.The oar blade on the oar is made of wood and metal alloy.
   桨上的桨叶是由木材和合金制成的。