Metcolizing
铸铁表面(喷)渗铝法
🗣️ 情景例句
I made another lunch date for today
我和别人约好共进午餐，，
How do you do?
你好！
Byrd now knew that he would be able to reach the South Pole which was 300 miles away, for there were no more mountains in sight.
伯德这时知道他能够顺利飞抵300英里以外的南极了，因为前面再没有山了。