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回音 huíyīn
gen.	bounce-back
auto.	sound reflection; sound reverberation
expl.	echoing
met.	anacamptic sound
multimed.	echo

回音: 72 phrases in 22 subjects

Advertising	1
Agriculture	1
Architecture	3
Automobiles	1
Aviation	2
Bridge construction	1
Business	1
Communications	2
Electric machinery	1
Electronics	5
Exhibitions	1
General	9
Household appliances	1
Hydrology	1
Information technology	3
Mathematics	1
Mining	1
Multimedia	3
Nursing	1
Port facilities	1
Technology	26
Telecommunications	6