Preconcentrator
[化] 预浓缩器
🗣️ 情景例句
A foreign diplomat grabbed his chopsticks as a historic souvenir.
一名国外的外交人员就拿起他用过的筷子，用它作为具有历史意义的纪念品。
Can I take your order?
您要点菜吗？
You are just putting on a little weight. I believe you'll get that off easily.
你只是稍微胖了些，很快就会恢复的。