Casehardening
v. 使无情, 使表面硬化( caseharden的现在分词 )
✅ 同义词
🗣️ 情景例句
Look at those eyes.
你看它的眼睛。
A penny saved is a penny earned(or gained).
省钱就是赚钱。
Last year, however, it came into use.
然而去年机场开始使用了。