Hé / tóng / jì / rán / qiān / le / jiù / fù / shuǐ / nán / shōu / dà / jiā / zhǐ / néng / jì / xù / hé / zuò

合同既然签了，就覆水难收，大家只能继续合作。

Now that the contract has been signed, there is no turning back, so everyone must continue working together.