Acieration
金属镀铁硬化
🗣️ 情景例句
Do you already have a boyfriend?
你已经有男朋友了吗？
It's just a mosquito bite.There's nothing to worry about.
只是一只蚊子咬的伤口， 不要担心。
There was no doubt that we were unwelcome visitors.
毫无疑问，我们的来访是不受欢迎的。