Preconcentrator
[化] 预浓缩器
🗣️ 情景例句
What about a cup of tea?
喝杯茶如何？
After forty years teaching English he thinks it's time to call it a day.
他教英语四十年，认为该退休了。
If a pan can have a baby, it can die, too! (He starts to laugh.)
假如锅能生孩子，那么它也能死！（他开始大笑）。