middle early

例句：

1. 1. The middle of the road is where cars usually stop.
   道路的中间是汽车通常停下来的地方。
2. 2. The middle school students are preparing for the upcoming exams.
   中学生正在为即将到来的考试做准备。
3. 3.The middle class is growing in size and influence.
   中产阶级的规模和影响力正在增长。