英语翻译 -----------------级急级

把···和···结合起来
combine sth. with sth.
at one time
有一次
在你的脑海里
in your mind
中小学教育
elementary and high school education
进行一些特殊的培训
do some special training

Get up to the combination
一度
In your brain
Medium and small study the education
Make some special trainings

In your mind
Primary and secondary education
Some special training