Percolumbic acid
[化] 过铌酸
🧩 词语组成解析
🗣️ 情景例句
Sir, this offer will expire this week.
先生，这次特价这个礼拜就结束了。
A man may lead a horse to the water, but he cannot make him drink.
牵马到河易，强马饮水难。
Close the door after you，please.
请随手关门。