Second, the filter bubble is invisible.

第二，过滤器泡泡是无形的。

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Together, these engines create a unique universe of information for each of us — what I've come to call a filter bubble — which fundamentally alters the way we encounter ideas and information.

总之，这些引擎创建一个我们每个人独特的全局信息——这就是我称之为“过滤器泡泡”的东西——这从根本上改变了我们以前遇到的想法和信息的方式。

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A property bubble in Bulgaria seems to be on the verge of bursting, though this has still to filter through to the rest of the economy.

虽然保加利亚的资产泡沫仍将渗入该国经济的其他领域，但是它看似正处在破灭的边缘。

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Eli Pariser describes all this in great detail in his excellant book, The Filter Bubble.

FORBES: How Facebook's Empire Of Opacity Is Hiding Posts You Want To See

With the help of our listeners we've done that with The Filter Bubble.

BBC: Click listeners test 'filter bubble'

That's the argument of Eli Pariser's book The Filter Bubble, which we explored in a film for Newsnight on Tuesday evening.

BBC: Are we trapped in our own web bubbles?