Polymetallism
多本位制
🗣️ 情景例句
It's hard for some older people to take all that noise.
一些老年人没办法忍受那些噪音。
I want to purchase some computers from your company.
我想从贵公司购买一些电脑。
You must look after it. Give it to Mr. Hu.
你一定要好好保管啊！让胡老师帮你拿着。