啮齿动物

niè chǐ dòng wù de fēng lì yá chǐ

啮齿动物的锋利牙齿

the rodent's sharp teeth

yán jiū rén yuán guān chá dào yī zhī niǎo bǎ yī zhī niè chǐ dòng wù dìng zài yī kē xiān rén zhǎng shang

研究人员观察到一只鸟把一只啮齿动物钉在一棵仙人掌上。

Researchers observed one bird impale a rodent on a cactus.