double-face

例句：

1. 1. He is a double-faced man, always changing his mind.
   他是一个双面人，总是改变主意。
2. 2. She was accused of being a double-faced woman, capable of both kindness and cruelty.
   她被指控是双面女人，既有善良又有残忍。
3. 3. The double-faced leader tried to hide behind the law to cover up his crimes.
   这个双面领导人试图用法律来掩盖他的罪行。