Limonitization
褐铁化作用
🗣️ 情景例句
I'm taking 19 credit hours.
我修了十九个学分。
Perhaps you've heard our product's name. Would you like to know more about it?
也许你已听说过我们产品的名称，你想知道更多一点吗？
Yes, I do.I want her to come to my office.Tell her to come at once.
是的，我要她到我的办公室来。叫她马上就来。