A trick in card games, especially bridge, the loss of which prevents a declarer from making a contract.

牌戏中一圈牌，尤指桥牌，失去它就阻止叫王牌者无法叫牌。

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That small amount of profit would come after you received your Buy-Back credit in the form of a Best Buy gift card and absorbed the penalty of breaking your two-year phone contract, commonly known as an early termination fee (ETF).

FORBES: Best Buy: Yes, You Can Make A Profit From Our New Buy Back Program

Some of the contests will feature the actual phone (carrier branding may vary), while others will offer an Apple Store gift card to cover the cost of buying one without a contract.

ENGADGET: Introducing Engadget's next giveaway: Five iPhone 5s in five days!

Following each contract renewal, I personally hand write a thank you card to every member of the company who works directly with the business.

FORBES: Customer Service 101: Thank You Cards and Doughnuts