每个四个水平，你有一个红利荧屏你的挑战要哪里推动砖瓦为了要正确的显示一些出名的物理学者的照片。
Every four levels, you have a bonus screen where your challenge is to push tiles in order to correctly display the picture of some famous physicists.
总体而言，无论平台和理解水平都几乎相同的四个阅读格式上，每个用户平均花费了17分钟20秒阅读故事。
Overall, it took each user an average of 17 minutes and 20 seconds to read a story regardless of the platform and comprehension levels were virtually identical on all four reading formats.
第四个图标是比较条形图观点。它允许你快速查看每个条目是否在表中的表现高于或低于平均水平。
The fourth icon is the comparison bar graph view. It allows you to quickly see whether each entry in the table is performing above or below average.
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