Zhè / fèn / hé / tong / de / nèi / róng / bù / néng / suí / biàn / gēng / dòng / , / bì / xū / jīng / guò / shuāng / fāng / tóng / yì / 。

这份合同的内容不能随便更动，必须经过双方同意。

The contents of this contract cannot be changed at will and must be approved by both parties.