啮齿动物

例句：

1. 1. Rats are known to carry diseases that can be transmitted to humans.
   老鼠已知携带可以传染给人类的疾病。
2. 2. Rodents are often found in urban areas where they feed on garbage.
   啮齿类动物通常在城市地区被发现，它们以垃圾为食。
3. 3. The research team is studying the behavior of these small mammals to better understand their ecology.
   研究小组正在研究这些小型哺乳动物的行为，以便更好地了解它们的生态学。