MIT students and faculty members visited the area in the last days of August, 2001 through the first week of September, 2001.
麻省理工学院的学生及全体成员,于2001年八月下旬至九月的第一个礼拜期间,参访了基地。
It was the end of July or the beginning of August, in the last few days before summer vacation.
那是七月底或八月初,暑假前的最后几天。
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