奥本海默博士招募了28位年龄在18到40岁之间的志愿者，要求他们通过阅读一些文字资料来学习三类外星人“物种”的相关信息，每种外星人都有7个特征。
Dr Oppenheimer recruited 28 volunteers aged between 18 and 40 and asked them to learn, from written descriptions, about three "species" of extraterrestrial alien, each of which had seven features.
虽然从古老的文字记录和木刻看来，人类看到幽浮和驾驶幽浮的外星人可能已经有好几世纪的历史了，近代对于外星人的关注却直到1947年才兴起。
Although it seems possible from old writings and woodcuts that UFOs and aliens piloting them have been seen for centuries, the modern interest in them dates only from 1947.
虽然从古老的文字记录和木刻看来，人类看到幽浮和驾驶幽浮的外星人可能已经有好几世纪的历史了，近代对于外星人的关注却直到1947年才兴起。
Although it seems possible from old writings and woodcuts that UFOs and aliens piloting them have been seen for centuries, the modern interest in them dates only from 1947.
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