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упущенный случай stresses
gen.	missed opportunity (Sergei Aprelikov)
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gen.	blunder away one's chance; let slip the chance; let the opportunity slip; miss the boat; pass up an opportunity; make a muff of a catch; let the opportunity go by (Anglophile); let an opportunity slip; lose an opportunity; waste a chance (Ремедиос_П); neglect an opportunity; miss one's opportunity
econ.	miss an opportunity
fig.	let go a whiting
Makarov.	let slip an opportunity; lose opportunity; miss opportunity; chuck away a chance; miss one's chance
slang	muff a chance; miss the bus

упущенный случай: 23 phrases in 2 subjects

General	13
Makarov	10