Some children leave school at 16.

有些学生16岁就离校了。

We eagerly anticipated the day we would leave school.

我们迫切地期盼着毕业离校的那一天。

For the record, most Moscow girls leave school at about 18.

随便说一下，多数莫斯科女孩大约十八岁离开学校。

I told my mother I wanted to leave school but she didn't approve.

我告诉母亲我不想继续上学，但是母亲不同意。

All students should be numerate and literate when they leave school.

所有的学生毕业时都应具备计算和读写的能力。