Security personnel ensured all the doors and windows were locked before leaving the school building.

I know all the ins and outs of our school building.

我知道我们教学大楼的一切情况.

The front of the main school building faces south.

学校主楼的正面朝南.

I was waiting for the school bus but it didn't come.

我苦苦等校车来,校车却迟迟未到.

He bicycles home after school instead of taking the school bus.

放学后他骑自行车回家,而不坐校车.

Behind the school bus is a big yellow cement truck.

在学校巴士后面是一辆大的黄色混凝土预拌车.

In which direction is the school bus pictured below traveling?

下图的校车是向哪个方向开的?

The school bus is free.

校车是免费的.

But most students take the school bus to school.

但大部分学生乘校车上学.

I walk to a street corner and wait for the school bus.

我走到街角等校车。

Children scampered off the yellow school bus and into the playground.

孩子们欢快地跑下黄色的校车，冲进运动场。

What bad luck ! I've missed the school bus.

真糟糕,误了校车了.

Children of school age: 1 \ 2 tablet, 2 3 times daily.

学龄儿童: 每次1;2片, 1日2～3次.

And of course, this system isn't limited to school age children.

当然, 这种制度并不仅限于在中学念书的孩子.

In school age children, depression can be underachievement and withdrawal from school and social activities.

对学龄儿童来说, 抑郁表现为学习成绩差,畏缩学校和社会活动.

He dropped of school age 16, so he never went to college.

他在16岁时辍学, 因此他从来也没有上过大学.

As our two girls became school age, we enrolled them in a local kindergarten.

当我们的两个女儿到了入学年龄, 我们送她们到当地的幼儿园.

My son has arrived school age.

我儿子已到上学“年龄”.

Primary school age, was the proud memory of the period.

小学时代, 曾是记忆中引以自豪的时期.

He has reached school age.

他已经达到上课年龄.

My son has arrived at school age.

我儿子已到上学年龄.