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1·Tie-in sale is not encouraged.

不主张搭卖。《新英汉大辞典》

2·A business operator shall not, in selling its or his goods, make a tie-in sale against the wish of the buyer or attach other unreasonable conditions.

经营者销售商品，不得违背购买者的意愿搭售商品或者附加其他其他不合理的条件。

3·Tie-in-sale is one of the sale strategies for firms, but it is not always effective.

搭配销售是厂商的销售策略之一，但并不总是有效。