Concentration difference
[建] 浓度差
🧩 词语组成解析
🗣️ 情景例句
Where?
在哪？
Mr. Jones spent his undergraduate days at Columbia.
琼斯先生在哥伦比亚大学渡过了他的大学时代。
Most people believe that the strike will last for at least a week.
多数人认为此次罢工至少会持续一个星期。