“为什么你要帮凯蒂呢？布克先生，不要狡辩了！”校长并不想继续听布克的解释。

"Why are you helping Katie? Don't quibble about Mr. Booker!" the headmaster doesn't want to hear the Booker explanation.

youdao

别为难自己了，如果他/她还是满口谎话，不要管是大谎还是小谎，直接跟他/她挑明，不要给他/她狡辩、自圆其说的机会。

Do yourself a favor: If he keeps lying, whether these lies are big or small, get out while you can and don't let him talk his way back in.

youdao