Most Middle Eastern countries have extremely high rates of population growth.

大部分中东地区的国家都有着极高的人口增长率。

《柯林斯英汉双解大词典》

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The move from elementary school to middle school or junior high can be difficult.

从小学进入中学或者初中的这种变动可能会有困难。

《柯林斯英汉双解大词典》

Programs begin in elementary school and continue through middle and high school.

VOA: special.2009.11.27

From there, after high school, I went to New York University. I completed bachelors of Middle-eastern and Islamic studies and political science.

在读完高中以后，我去了纽约大学，拿到了,中东和伊斯兰研究以及,政治学的学士学位。

普林斯顿公开课 - 人性课程节选

Like back in middle school and high school.

大概是在初中和高中时期。

和英文专业的朋友 - SpeakingMax英语口语达人

But my goal is to challenge more schools and more communities to take part in this, particularly middle and high school students, because right now those 635 students are at the elementary school level, and we need to take this challenge up to kids in middle schools and high schools.

WHITEHOUSE: The First Lady Urges Healthy Diet and Exercise

When I was in high school, they built an indoor driving range, and the intention at that time was to train middle or high school students to be golfers.

CNN: Interview with K.J. Choi

Across the country thousands of elementary, middle and high school students are feeling the impact too.

CNN: Students can't be part of main graduation because of Mexico trip