contract for the delivery of goods by installments

例句：

1. 1. The company has signed a contract with the supplier for the delivery of goods by installments.
   该公司已与供应商签订了一份分期交货的合同。
2. 2.The contract stipulates that the delivery must be completed within six months.
   合同规定必须在六个月内完成交货。
3. 3. The contract was signed by both parties on January 1st.
   双方于1月1日签署了合同。