Polysulfonate
多磺酸盐
🗣️ 情景例句
Welcome, Mr. Stewart.
欢迎， Stewart先生。
They that marry in green, their sorrow is soon seen.
过早地结婚，不久必悔恨。
We can read of things that happened 5,000 years ago in the Near East,
我们从书籍中可读到5，000 年前近东发生的事情，