zhè / bǐ / jiāo / yì / yǒu / àn / pán / wài / rén / hěn / nán / zhī / dào / zhēn / shí / jià / gé

这笔交易有暗盘，外人很难知道真实价格。

There is a secret price in this transaction, so it is difficult for outsiders to know the true price.