Obdurability
n. 坚固
🗣️ 情景例句
We usually accept payment by irrevocable L C payable against shiping documents.
我们一般用不可撤销信用证，凭装运单据结汇付款方式。
Discontent is the first step in progress.
不知足是前进中的第一步。
I work in a small factory.
我在一个小工厂里工作。