9. 第四期款:全部工程完工，驗收通過後支付尾款10%。

9. 第四期款:全部工程完工，驗收通過後支付尾款10%。

結果 (英文) 1:

9. The fourth installment: all projects are completed, 10% of the final payment will be paid after acceptance.

結果 (英文) 2:

9. Phase IV: Complete the work and pay 10% of the final amount upon acceptance.

結果 (英文) 3:

nine The fourth payment: after the completion of the whole project, 10% of the final payment will be paid after the acceptance.