Pentacid
a. [化]五价的
🗣️ 情景例句
When did you come here?
是什么时候来这儿的？
I asked you if you wanted some help.
我是问你是否需要帮忙。
So far, they have been unlucky in their search for gold and have no money at all.
到那时为止，他们寻找金子一直碰不上好运，而且他们身上一点钱也没有了。