✅ 同义词
📖 牛津释义
thanklessness
n [U].
🗣️ 情景例句
Rome wasn't built in a day.
冰冻三尺，非一日之寒。
That which is evil is soon learnt.
恶行易学。
He thought they needed to know the direction to it.
它们还需要知道去那里的方向。