When researchers set up a display featuring a line of exotic, high-quality jams, customers who came by could taste samples, and they were given a coupon for a dollar off if they bought a jar.
调查者陈列出一排异国风味的高品质果酱，经过的顾客都可以尝试一下样品，并且他们还获得一张购买果酱便宜一美元的赠券。
When researchers set up a display featuring a line of exotic, high-quality jams, customers who came by could taste samples, and they were given a coupon for a dollar off if they bought a jar.
调查者陈列出一排异国风味的高品质果酱，经过的顾客都可以尝试一下样品，并且他们还获得一张购买果酱便宜一美元的赠券。
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