Polyanion
聚阴离子
🗣️ 情景例句
Exactly.
就是这样。
I'm very much obliged to you.
非常感谢您。
We are all very excited and are looking forward to the Olympic Games because they have never been held before in this country.
我们都非常激动，盼望着奥运会的到来，因为在这个国家里还从未举办过奥运会。