那位顾客同买东西的人讨价还价，嘴皮都磨破了，可那人就是不降价。

[误] The customer bargained with the seller till he had worn out his lips, but the seller didn\'t change his

price.

[正] The customer had worn out his tongue bargaining with the seller, but the seller didn\'t change his price.

注：中文用“嘴皮”，但 tongue 却更符合英国人的习惯。另外，“保持缄默”的英文是 bite the ongue。