tā / zài / fáng / wū / mǎi / mài / zhōng / jū / jiān / bāng / zhù / shuāng / fāng / shùn / lì / qiān / dìng / le / hé / tóng

他在房屋买卖中居间，帮助双方顺利签订了合同。

He mediated the property sale and helped both parties sign the contract smoothly.