Polyanion
聚阴离子
🗣️ 情景例句
Eight pounds six, just like me.
八磅六， 跟我一样。
Is there any chance of my borrowing your typewriter?
能不能借用一下你的打字机？
Mary is still writing letters. She's been writing letters all day.
马力还在写信，她写了一整天的信。