Preconcentrator
[化] 预浓缩器
🗣️ 情景例句
But this is what you've been working for all these years.
但你多年来的工作 为的就是这个呀。
Are there any questions?
还有什么问题吗？
'It's a strange mixture I make myself. '
“这是一种我自己配制的奇特的混合物。”