Dianion
二价阴离子
🗣️ 情景例句
Don't talk with your mouth full.
嘴里满是东西时别说话。
English has become an international language.
英语已经成为一门国际语言。
One Saturday morning, Frank visited an antique shop in my neighbourhood.
一个星期六的上午，弗兰克去了我家附近的一家古玩店。