rat

/ræt/📚 3593 48 2四级六级考研托福雅思中考高考
A rat is an animal which has a long tail and looks like a large mouse. 老鼠

noun [专属名词]老鼠;<非正式>卑鄙小人(尤指欺诈或变节者);<非正式> 常客,常待在某处的人;<美>(为头发定型做出饱满效果的)女用发垫

This was demonstrated in a laboratory experiment with rats这点通过在实验室中用老鼠做试验得到证明。

verb [vt. 及物动词]捕(捉)老鼠,灭鼠;<非正式> 告发,告密;<非正式> 背信弃义,食言;<美>用发垫给(头发)定型

hey were accused of encouraging children to rat on their parents. 他们被指控怂恿孩子们告发他们的父母。

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