Phosphonous acid
[化] 亚膦酸
🧩 词语组成解析
🗣️ 情景例句
Yes. I'm sorry, but how do you spell your last name, sir?
好的，不过对不起，先生你的姓怎么拼？
One cloud is enough to eclipse all the sun.
一叶可障目。
What's up?
怎么了？