1、Dirty dog always ungrateful, ungrateful originally part of the base.
卑鄙小人總是忘恩負義的，忘恩負義原本卑鄙的一部分。

2、That dirty dog tried to cheat me!
那個寡廉鮮恥的家伙企圖欺騙我!

3、Dirty dog always ungrateful, was originally a part of base ingratitude.
卑鄙小人總是忘恩負義的，忘恩負義原本就是卑鄙的一部分。