The company has to fulfill the terms of its obligation.
这个公司必须履行合同条款。
Though they think it takes no more than three days to fulfill the mission, I believe it takes not less than six days.
虽然他们认为完成这任务只需三天, 但我却认为至少需要六天。
You must fulfill your promise.
你必须履行诺言。
