买一送一 buy one get one free ; two for one ; Give One Get One ; two-for-one offer ; buy one item with another similar item presented free

买一赠一 buy one get one free ; FINIAL ; two-for-one ; Buy one get on free

买一捐一 One for One

创建了买一捐一活动 Threads for Threads Initiative

平仓一买一卖 Square

那商店买一打送一 The shop sells it by the long dozen

买一善一 ONE CARES ONE

买一送一优惠 buy-one-get-one-free

所有鸡尾酒买一赠一 cocktail shooters special&cocktail