Preconcentration
n. 预选；预浓缩；预先富集
🗣️ 情景例句
He is a man of ability.
他是个很能干的人。
He didn't care for the taste of the drink.
他不喜欢这饮料的味道。
The disadvantage with carrying out interviews is that it may take a long time.
走访用户的不利之处是它需要很长的时间。