The university computer courses have their own characteristics which make the average system limited.
大学计算机课程的自身特点，使其在选用通用题库系统时存在局限性。
Give two characteristics which set birds apart from all other creatures.
列出两个雀鸟的特征，使牠们与其他生物分别出来。
Give two characteristics which set birds apart from all other creatures.
列出两个雀鸟的特征，使牠们与其他生物分别出来。
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