Limonitization
褐铁化作用
🗣️ 情景例句
I'll pick you up on Saturday night, OK?
我星期六晚上去接你好吗？
To make it fast, you can send a fax.
要想快点的话就发个传真。
That was a long time ago,wasn't it?
那是好久以前的事了。是吗？