According to the damage reason of the chemical reaction tower and the elementary test, this paper thinks the main factor to affect the safety of the tower is the stress in the work.

根据化工反应塔的损伤原因和对塔体进行的初步安全检测，提出影响该受损塔体安全的主要因素是其工作过程中所受到的应力。

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In fact, when several dozen elementary - and middle-school kids from the Detroit area used this exercise for 15 minutes a day, many showed significant gains on a widely used intelligence test.

实际上，当来自底特律地区的几十名中小学孩童在每天采用这套训练方法15分钟之后，很多人都在一项应用广泛的智力测验中表现出了明显的进步。

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Almost half of those who sat the exam were unable to solve elementary maths questions and a third failed a reading comprehension test.

参加考试的人中几乎有一半没能解出初级的数学试题，三分之一未能通过阅读理解测试。

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The clinical trial was designed such that almost two million elementary school children were given this test vaccine.

该临床试验的计划是,向近二百万的小学学生,接种这种测试疫苗

耶鲁公开课 - 生物医学工程探索课程节选

Under Vallas, elementary school reading and math test scores, though still low, are at seven-year highs.

FORBES: Chain Saw Paul

They talked to Realtors and other parents, researched test scores and class sizes, and ended up picking Carderock Springs Elementary, in Montgomery County, Md.

FORBES: Public Choice

Only about 45% of elementary students passed state reading exams last year, and 33% passed the math test.

WSJ: Segregation Fear Sinks Charter School