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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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