✅ 同义词
📖 牛津释义
thanklessness
n [U].
🗣️ 情景例句
Wrong number.
打错电话了。
I can manage. But thank you, anyway.
我自己行了，但还是要谢谢您。
It is hard for us to realize nowadays how difficult it was for the pioneers.
我们今天很难想像昔日的登山先驱们是多么艰苦。