流行病学研究发现，广泛性发育障碍（Pervasive Developmental Disorder）孩子和正常孩子相比较并没有更高的胃肠道患病率。

Epidemiological studies have found that children with PDD have no higher prevalence of gastrointestinal tract than normal children.

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下面来看看一些比较流行的和普遍平安夜传统。

Here is a look at some of the more popular and prevalent Christmas Eve traditions.

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当时，RSS是比较流行的XML应用之一。

At that time, RSS was one of the more popular USES for XML.

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So because so much popular music and particularly rock music has those chords in root position we can track them more readily.

因为很多流行音乐尤其是摇滚乐会在原位上添加这样的和弦,这样听起来会比较悦耳。

耶鲁公开课 - 聆听音乐课程节选