Polyanion
聚阴离子
🗣️ 情景例句
Yeah, just like I certainly did not expect to buy these gifts at such low prices.
是啊，我怎么也没想到买这些礼物才花了这么点钱。
I cannot believe that.
我还是不敢相信。
'I'll write a letter soon.
“我很快会写信的。