我們必須更密切合作，以完成本次合約，並建立客戶下一次採購合約的信心。

我們必須更密切合作，以完成本次合約，並建立客戶下一次採購合約的信心。

Results (English) 1:

We must cooperate more closely to the completion of this contract, the customer and build confidence under a procurement contract.

Results (English) 2:

We must work more closely together to complete this contract and build confidence in the customer's next purchase contract.

Results (English) 3:

We must work more closely to complete this contract and build up the confidence of customers in the next purchase contract.