承包商应随即开始施工，并按附录所述在完工日期或之前定期勤奋地进行并完成

承包商应随即开始施工，并按附录所述在完工日期或之前定期勤奋地进行并完成工程。

結果 (英文) 1:

The contractor shall start construction immediately, and regularly and diligently carry out and complete the project on or before the completion date as described in the appendix.

結果 (英文) 2:

The Contractor shall comp construction immediately and work diligently and diligently on or before the completion date as described in the Appendix.

結果 (英文) 3:

The Contractor shall immediately proceed with the works and diligently carry out and complete the works on or before the completion date as described in the appendix.