Polymetallism
多本位制
🗣️ 情景例句
You would be well-advised to book in advance.
你还是提前预订较为稳妥。
I was reminded of my promise.
有人提醒我不要忘了我的承诺。
Oh! Well, for that, you'd better find an English pen friend.
哦！那你最好为此找一个英文的笔友。