on-spot construction的用法和樣例：
例句
- For those who work on the site, bridging is hard in other ways.
在其它方面，對現場施工人員來說，架橋則是一項很艱苦的工作。 - The long-deep tunnels under complex geological conditions always have water-fathering problems which affect the construction safety and course.
摘要複雜條件下的深埋長隧涌突水是常見的主要災害之一，嚴重威脅著現場施工安全及進度。
