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汉语拼音：niè chǐ lèi dòng wù

哺乳纲中种类最多、分布最广的一类动物。没有犬齿，门齿与前臼齿间有空隙。以食植物为主。大多数种类繁殖迅速，如兔类和鼠类动物。

• Such persistence is usually interpreted by students of rodent behaviour as evidence of a more positive mood.

  这种持久性经常被研究啮齿类动物行为的学生解释为更积极情绪的证据。

• The rodent is one of the most endangered mammals in North America, with less than 40 individuals found in an area less than 10 sq. km.

  在北美这种啮齿类动物是最濒危哺乳动物，只有不到40个体在只有不到10平方公里的范围内生存。

• Mice and rats remain the main animals for medical research, but the effects on rodents often do not mirror those in people.

  家鼠和野鼠至今仍是医学研究中主要使用的动物，但在啮齿类动物身上呈现的效果并不会当然地同于人类。

• The old, exercised animals then performed almost as well as much younger rats on rodent memory tests.

  这些年老，运动后的老鼠们在啮齿类动物记忆里测试中的表现跟年轻老鼠的表现一样好。

• In some cases the monogamous rodents will, no doubt, become promiscuous.

  无疑，在某些情况下，这种一夫一妻制的啮齿类动物也会变得滥交。

• A top hat originally made of the underfur of this rodent.

  海狸皮大礼帽最初用这种啮齿类动物的内层绒毛制成的高帽

• a top hat originally made of the under fur of this rodent.

  最初用这种啮齿类动物的内层绒毛制成的高帽。

• Though it might seem odd that a cup of yogurt can influence behavior, the phenomenon has been repeatedly confirmed, at least in rodents.

  一杯酸奶就可以影响行为，虽然看似奇怪，但这种现象至少已在啮齿类动物身上一再被证实。

• Among the latter is the eastern voalavo, a rodent endemic to Madagascar, whose habitat is threatened by slash-and-burnfarming methods.

  东方voalavo就属于后者，这是马达加斯加特有的一种啮齿类动物，其栖息地受到了“刀耕火种”生产方式威胁。