sign a contract

例句：

1. 1. They signed the contract with the company yesterday.
   他们昨天与公司签署了合同。
2. 2.The agreement was reached through mutual negotiation.
   通过互相协商达成了协议。
3. 3. Before signing the contract, they reviewed all the terms and conditions.
   在签署合同之前，他们审查了所有条款和条件。