After a few minute, the student perk up and begin a heated discussion.
After a few minute, the student perk up and begin a heated discussion.
过了几分钟，学生们活跃起来，开始了热烈的讨论。
After a few minute, the student perk up and begin a heated discussion.
过了几分钟，学生们活跃起来，开始了热烈的讨论。