Preconcentration
n. 预选；预浓缩；预先富集
🗣️ 情景例句
I suppose so.
我认为是这样。
The interviewer is not supposed to ask.
面试人也不应该问这个问题。
A week later, the editor at last received a fax from the journalist.
一周之后，编辑终于接到记者的传真。