It is needed for the file opening, closing, reading, and writing functions (fopen , fclose , fgets , getc , and so on), for the printf family of functions, and for the setvbuf function.
For the past five years, the national conversation on education has focused on reading scores, math tests and closing the "achievement gap" between social classes.
过去的5年中，全国范围内关于教育的讨论集中在阅读分数，数学考试，消除社会各阶层之际成就差距上。
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And because we acted, students are performing better in reading and math, and minority students are closing the achievement gap.