The Contractor shall not make any alteration and/or modification of the Permanent Works, unless and until the Engineer instructs or approves a Variation.
承包商不应对永久工程作任何更改或修改，除非且直到工程师发出指示或同意变更。
The Contractor shall not make any alteration and/or modification of the Permanent Works, unless and until the Engineer instructs or approves a Variation.
承包商不应对永久工程作任何更改或修改，除非且直到工程师发出指示或同意变更。
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