Obdurability
n. 坚固
🗣️ 情景例句
I'm paying lots of money for you, so you'd better do well.
我为你花了那么多钱，所以你要好好干。
Laugh at your ills, And save doctors' bills.
生病不忧虑，节省医药费。
Yes, I think they'll return next month.
是的，我想他们下个月回来。