The elementarystudies show that insect species can be accurately distinguished through the sound-frequency characteristics of insect activity in grain.
Both elementary and high school students in Massachusetts must pass a series of standardized tests throughout their studies.
马萨诸塞州小学和高中的学生在学习生涯中都必须通过一系列标准化测试。
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High school students' lack of a historical knowledge base can partially be explained by the decrease in class time spent on social studies at the elementary level.