Metcolizing
铸铁表面(喷)渗铝法
🗣️ 情景例句
Guess what?
你猜怎么的？
Why are you so sad?
你为什么这样伤心？
A week before, he had completed a successful overland flight during which he covered twenty-six miles.
一周以前，他曾成功地进行了一次26英里的陆上飞行。