合同明确规定所有付款必须在30天内完成。
The contract ___stipulated that all payments must be completed within 30 days.
合同明确规定供应商必须按时交货。
The contract ___stipulates that the supplier must deliver on time.
合同明确规定付款必须在30天内完成。
The contract ___stipulates that payment must be made within 30 days.