Polymetallism
多本位制
🗣️ 情景例句
Right. What's old?
对了， 旧的东西是什么？
I'm sorry, but I can't find the book you lent me.
很抱歉！我找不到你借给我的那本书了。
It immediately ran away when she saw it, and experts confirmed that a puma will not attack a human being unless it is cornered.
她刚看见它，它就立刻逃走了。专家证实，美洲狮非被逼得走投无路，是决不会伤人的。