Concn
abbr. concentration 集中; 集合; 专心; 浓缩
🗣️ 情景例句
You have to ask for my father's permission.
你必须征得我父亲的同意。
better early than late.
宁早勿迟。
Do you usually buy in large quantities?
你们的订购量通常都很大吗？