Amberplex
离子交换膜
🗣️ 情景例句
No,
不对，
John is really scared of airplanes.
约翰真的很怕乘坐飞机。
Let's go together then. I'll meet you at the theatre at six-thirty.
到时咱们一块儿去看吧。我六点半在剧院跟你会面。