在海工 EPC（设计、采购、施工）项目中，无论是工程会议汇报、进度报告撰写、施工方案交底还是验船师沟通，清晰的时间逻辑都至关重要。以下是贴合海工项目场景的时间顺序表达，替换基础词汇的同时适配工程语境：

1. 表示项目启动 / 初期阶段

• First / Firstly
  First, we need to finalize the FEED (Front-End Engineering Design) deliverables with the client.
  首先，我们需要与业主确认前端工程设计（FEED）的交付成果。

• To begin with（更正式，用于会议开场）
  To begin with, the marine survey team will conduct seabed soil sampling at the installation site.
  首先，海洋勘测团队将在安装场址进行海床土壤取样。

• Initially / At the outset
  Initially, the structural design must comply with ABS (American Bureau of Shipping) standards.
  项目初期，结构设计必须符合美国船级社（ABS）标准。

2. 表示后续阶段 / 流程推进

• Next
  Next, the procurement team will issue POs (Purchase Orders) for subsea connectors.
  接下来，采购团队将下发海底连接器的采购订单（PO）。

• Subsequently（书面用语，用于进度报告）
  The jacket fabrication will be completed by Q3, and subsequently, the pile driving work will commence.
  导管架制造将于第三季度完成，随后将启动打桩作业。

• Following that
  Following that, the commissioning team will conduct hydrotest on the process piping.
  之后，调试团队将对工艺管道进行水压试验。

• In the next phase
  In the next phase, we’ll coordinate with the offshore installation vessel for load-out scheduling.
  下一阶段，我们将与海上安装船协调装船计划。

3. 表示并行作业 / 过渡期

• Meanwhile / In the meantime
  The topside module is being assembled in the yard; meanwhile, the mooring system is undergoing factory acceptance testing (FAT).
  上部模块正在场地组装，与此同时，系泊系统正在进行工厂验收测试（FAT）。

• Concurrently（工程术语，强调同步性）
  The electrical wiring and instrumentation installation will proceed concurrently to save critical path time.
  电气布线与仪表安装将同步进行，以节省关键路径时间。

• At the same time
  We’ll deploy the ROV (Remotely Operated Vehicle) for subsea inspection, and at the same time, the onshore control system will be pre-commissioned.
  我们将部署遥控潜水器（ROV）进行海底检查，同时陆基控制系统将进行预调试。

4. 表示收尾 / 验收阶段

• Finally / Lastly（用于项目总结）
  Finally, the owner’s inspector will conduct the final acceptance test (FAT) for the entire system.
  最后，业主验船师将对整个系统进行最终验收测试（FAT）。

• Ultimately（强调最终结果）
  Despite delays caused by adverse weather, we ultimately achieved mechanical completion (MC) by the end of the year.
  尽管受恶劣天气影响导致延误，我们最终在年底完成了机械完工（MC）。

• Upon completion
  Upon completion of the offshore hook-up, the project will enter the performance test phase.
  海上连接作业完成后，项目将进入性能测试阶段。

海工项目场景组合示例

• 会议汇报模板
  Initially, we clarified the scope of work with the client, including the subsea tree specifications.
  Next, the engineering team finalized the 3D model for the manifold.
  Subsequently, procurement placed orders for high-pressure valves with a 12-week lead time.
  Meanwhile, the construction yard started fabricating the jacket foundations.
  Finally, we’ll submit the integrated schedule for client approval by Friday.

• 进度报告过渡句
  To begin with, I’ll outline the progress of the topside integration.
  Following that, we’ll review the pending issues with the offshore crane installation.
  Ultimately, we’ll discuss the revised timeline for first oil production.

高级替换表达（适配工程语境）

• First → At the outset / To initiate
• Then → Subsequently / In the subsequent phase
• Finally → Upon completion / Ultimately
• Meanwhile → Concurrently / In parallel