duvetyn

例句：

1. 1. Duvetyn is a type of blood-sucking invertebrate that can be found in freshwater and saltwater environments.
   水蛭是一种生活在淡水和咸水环境中的血吸虫。
2. 2. The duvetyn has a long, thin body with a sucking mouthpart at the end.
   水蛭身体细长，末端有一个吸血的口器。
3. 3. Duvetyn are known for their ability to extract nutrients from the blood of their hosts.
   水蛭因其从宿主血液中提取营养的能力而闻名。