echo chamber

基本解释

Yeah, I think the echo chamber.
是的，我想是回音壁那幅。
210.28.216.200
CES is the home of the mainstream, the chorus, the echo chamber;
CES是主流的大本营、合唱队、回音室。
On most days, conservatives occupy just a few back-row seats in this giant liberal echo chamber, not because Republicans are screened out by editors but because they don't show up in the first place.
在大部分日子里，在这个巨大的自由派回音室里，保守派仅占据后排的几个位置，不是因为共和党被编辑给屏蔽了，而是因为他们根本就不出现。

The discussion is a financial-industry echo chamber at times, as insiders focus on regulatory minutiae.
FORBES: Memo to New SEC Chief: Ask the FAA How to Stop the Next Flash Crash
Until recently, inside the media echo chamber Mitt Romney had been the favorite for the Republican nomination.
FORBES: Perry Not Letting Anyone Run to His Right
They need to hear your voices because right now the Washington echo chamber is in full throttle.
WHITEHOUSE: Fighting for Health Insurance Reform

a room or space in which sound echoes (= is repeated because it is reflected from the walls, etc.)
a situation in which people only hear opinions of one type, or opinions that are similar to their own

a room with walls that reflect sound. It is used to make acoustic measurements and as a source of reverberant sound to be mixed with direct sound for recording or broadcasting (Also called reverberation chamber)