rat(名词):老鼠;鼠类,常指体型较大的鼠。口语中也可指告密者/叛徒(较贬义)。
/ɹæt/
A rat ran across the kitchen floor.
一只老鼠跑过了厨房地板。
He was accused of being a rat who betrayed his friends to the police.
他被指责是个向警方出卖朋友的告密者。
rat 来自中古英语 ratte,与多种日耳曼语词形相关,最初主要指这种啮齿动物;后来在英语俚语中引申出“告密者、背叛者”的含义。