Concn
abbr. concentration 集中; 集合; 专心; 浓缩
🗣️ 情景例句
This method should be widely promoted.
这种方法应该推广。
We never know the worth (or value) of water till the well is dry.
井枯方知水可贵。
Over a year passed before the first attempt was made.
然而一年多过去了才有人出来尝试。