仅用几天时间
It only took a few days
以上为机器翻译结果，长、整句建议使用 人工翻译 。
有规律上网者的大脑已经显示出这些区域的活动，而研究人员惊奇地注意到，无经验的用户仅用几天时间就能赶上来。
The brains of the regular Internet users already showed activity in these regions, and researchers were startled to note that it only took a few days for inexperienced users to catch up.
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