Acieration
金属镀铁硬化
🗣️ 情景例句
Hi, Anita, long time no see.
嗨，安妮塔，好久不见了。
This part of the country is very heavily populated.
这个国家这一部分人口很密集。
Because the gravity on the Moon's surface is only a sixth of Earth's
由于月球表面的重力仅是地球表面的1/6-