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внезапная вспышка stresses
gen.	blow off
forestr.	flare up
inf.	blow-off (эмоций); outbreak (заболевания; a sudden rise in the incidence of a disease: an outbreak of measles Val_Ships)

внезапная вспышка: 6 phrases in 4 subjects

American usage, not spelling	1
General	2
Makarov	2
Psychology	1