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espectro n
commun.	écho fluctuant
math.	spectre m

espectro: 74 phrases in 17 subjects

Antennas and waveguides	2
Communications	3
Earth sciences	5
Electronics	9
Environment	2
Life sciences	1
Lighting other than cinema	4
Mathematics	15
Medical	1
Microsoft	3
Natural sciences	5
Pharmacy and pharmacology	1
Physical sciences	7
Power lines	1
Radio	6
Satellite communications	5
Telephony	4