【飞渡范老师】SAT每日一词（49）：echo

echo 的意思是 回响，回音，做动词时是 回应，随声附和 的意思
看到echo这个词，我就想起一个美国俚语，一般是用来骂人的~echo chamber
字面上的意思是 回音室，混响室 的意思，其实还有另外一个意思，看这张图~


echo chamber 的另一个意思是指 那些谄媚地同意别人所说一切的人~俗称 应声虫 或 跟屁虫~

Definition of ECHO
1
a : the repetition of a sound caused by reflection of sound waves
b : the sound due to such reflection
2
a : a repetition or imitation of another : reflection
b : repercussion, result
c : trace, vestige
d : response
3
: one who closely imitates or repeats another's words, ideas, or acts
4
: a soft repetition of a musical phrase
5
a : the repetition of a received radio signal due especially to reflection of part of the wave from an ionized layer of the atmosphere
b
(1) : the reflection of transmitted radar signals by an ob