Jackmanizing
深度渗碳; 深渗碳处理
🗣️ 情景例句
If you don't know a person's last name, use 'ma'am' or 'sir'.
如果你不知道一人的姓， 你应称呼他为 'ma'am' 或 'sir' 。
For a lost thing care nothing.
一事之失，不必介意。
It was my first flight. I was nervous when the plane took off.
我第一次坐飞机，起飞时我有点紧张。