tā / zài / mǎi / mài / shuāng / fāng / zhī / jiān / jū / jiān / zuì / zhōng / cù / chéng / le / zhè / bǐ / jiāo / yì

他在买卖双方之间居间，最终促成了这笔交易。

He mediated between the buyer and seller and ultimately brought the deal to completion.