潘克塞普曾对老鼠进行了相关研究，他发现，当老鼠玩耍的时候，他们经常发出一种唧唧喳喳很尖的声音——根据科学家表示，这是笑的一种原始形态。

Panksepp has studied rats and found that when they play, they often chirp—a primitive form of laughter, according to the scientist.

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根据科学家所说，茶叶中的茶多酚是最强的抗氧化剂。

The polyphenols found in tea are, according to scientists, the most potent of all the antioxidants.

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实际上，根据科学家的定义，里海同时具有海和湖的特征。

In the fact it is a sea and lake.

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It's really a technology initiative that's aimed to index the "dark" web or the hidden web, because according to computer scientists, right now the conditional search engines only index about 1% of the information on the Internet.

这是一项,致力于将暗网,或隐藏网页纳入索引的技术创新，根据计算机科学家的统计，条件式的搜索引擎只将,互联网上1%的信息纳入了索引。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选