训练的目的是让参与者选出那些落在和白色圆圈同一位置的伽伯补丁。
The aim is to pick out any of the Gabor patches that fall in the same place as the white circle.
这个白色圆圈从高空往下飘落，最后，就仿佛羽毛轻落到地上一般降在了冰面上。
At last, as easy as feathers coming to earth, the circle landed on the ice.
那面旗子是红色的，中间有一个白色的大圆圈。
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