for old students only
只适用于高年级学生
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Only five years old and originally conceived as a product for college students, Facebook now has more than 250 million members worldwide and is still growing fast.
Facebook只有5岁，原先设想供大学生使用，现在却在全球拥有超过2.5亿会员，而且还在快速成长。
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