My first letter is twice in apple, But not once in tart. My

特别声明:本平台所发布的部分公开信息来源于互联网,转载的目的在于传递更多信息及用于网络分享,并不代表本站赞同其观点,本平台所提供的信息,只供参考之用。不保证信息的准确性、有效性、及时性和完整性。如有侵权及违法信息请联系qq客服处理,3372575805谢谢合作!

My first letter is twice in apple
But not once in tart.
My second is in liver
But not in heart.
My third is in giant
And also in ghost.
Whole I'm best when t am roast.

pig