That's being ungrateful, and ingratitude is immoral.

这忘恩 不道德。

Never was hospitality more wholehearted than his. Yet in leaving him I couldn't be accused of ingratitude.

待客态度，从没有像他那么但白真诚。我离开他，我不能说忘恩。

I may have my faults, but ingratitude is not one of them.

【fault】我可能有我缺点，但决不会忘恩。

The same free people of Athens who defeated the Persians later treated Miltiades and Themistocles with just such ingratitude.

这曾战胜过波斯人自由雅典人民，也就后来很不知感激地对待米尔提亚德斯和泰米斯托克利斯雅典人民。

'Sharper than the serpent's tooth is the ingratitude of children.' Shakespeare. Kenig Lear

“比蛇牙齿更锋利孩子们忘恩。”莎士比亚，Kenig。

Cersei liked that not at all. Nor was she pleased by the High Sparrow's endless truculence and ingratitude. " Where is the High Septon" ? she demanded of Raynard. " It was him I summoned" .

瑟曦厌恶他们，她更厌恶大麻雀忘恩、无休无止地前来骚扰。" 总主教阁下呢？" 她劈面质问雷那德，" 我要见他本人。"

I then wished that I might die, and be buried with her; and, old as I now am, I would give worlds, were they mine to give, could my mother but have lived to tell me she forgave my childish ingratitude.

我多么希望我死了，和她埋在一起；现在不再年轻我，如果能让母亲活着告诉我她已经原谅我儿时不懂得感恩，我愿意用全世界来交换——如果全世界都我。