当你的演讲要从一个主题切换到另一个主题时，记得使用一些可以引起听众注意的信号词。

Use attention-provoking signals when you move from one part of the speech to the next.

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然后让病人对电脑复述这些词，每个词的脑信号符合76%到90%。

Then they got him to repeat the words to the computer and it was able to match the brain signals for each word 76 per cent to 90 per cent of the time.

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URL中的关键词就像给爬虫的另外一个信号。

Keywords in the URL are an additional signal to the spider.

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If you hear about signal transduction in biology, people that study signal transduction are studying just these things we talked about, how biochemical messages get transferred into cells and through cells.

如果你在生物学领域听到信号转导这个词,那么研究信号转导的人就是,在研究我刚才讲过的那些东西,生化信息如何传入细胞并传递至细胞各处

耶鲁公开课 - 生物医学工程探索课程节选