1.
bang for your buck
Charities try to get a better and bigger bang for the buck by keeping their expenses down. It may cost more, but you get more bang for your buck if you advertise on TV rather than on radio.
Anglais mot "idiom oznaczający wartość czyichś pieniędzy lub wysiłku"(bang for your buck) se produit dans des ensembles:
Bbc noworoczne postanowienia