Refractoriness
[化] 耐火度\\n[医] 不应性, 难治
🗣️ 情景例句
my grandfather is
我爷爷
I'm sorry to hear that.
听到这个消息我感到遗憾。
For our purposes, we are concerned only with one kind of cost----
就我们的目的而言，我们只关心一种费用-