她迅速用手按着心脏，感觉它跳的很快，很快。
She, quickly, put her hand over her heart and could feel it beating faster and faster.
极快地去游览一个长文件(用手指一直按着下翻页键)，注意屏幕上出现地虚文本的样子，同时注意寻找样子有没有奇怪的变化。
Page through a long file super rapidly holding your thumb on the Page Down button, notice the pattern of blurry text on the screen, and look for strange variations in that pattern.
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