忽快忽慢
Sometimes fast, sometimes slow
以上为机器翻译结果，长、整句建议使用 人工翻译 。
这种感觉就决定了进度条的变化是不规则的，导致了人们感觉进度条总是一顿一顿的。进度的忽快忽慢，可以让进度条看上去更快，尽管实际的剩余时间是没有改变的。
Although all the progress bars took exactly the same amount of time in the test, two characteristics made users think the process was faster, even if it wasn't.
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