adj.忘恩負義的；不領(lǐng)情的

At the risk of sounding ungrateful, I must refuse your offer. 我甘受拂逆盛情之嫌，也必須謝絕你的提議。

You are a very nice, but an ungrateful boy. 你是個很好的孩子，但又是個不領(lǐng)情的孩子。

It is a mistake to lavish kindness ungrateful people. 對于不領(lǐng)情的人來說浪費感情是一種錯誤。