Nemata

例句：

1. 1. The nematodes are the larvae of many insects.
   线虫是许多昆虫的幼虫。
2. 2. The nematodes were found in the soil samples.
   在土壤样本中发现了线虫。
3. 3.The nematodes are responsible for the spread of plant diseases.
   线虫负责植物疾病的传播。