1This is why the recent severe delays caused by numerous maintenance works have thrown the rail industry into chaos at a time when most people head on holiday, which matters for business in a country where tourism accounts for 10 per cent of GDP.
主干主语：This；谓语：is；表语：why 引导的表语从句（从句主干：delays have thrown the rail industry into chaos）
结构主干为 This is why...，why 引导表语从句。从句内 the recent severe delays 是主语，caused by numerous maintenance works 是过去分词短语作后置定语修饰 delays；at a time when... 中 when 引导定语从句修饰 time；which matters for business 是非限制性定语从句，指代前面整个情况；句末 where 引导定语从句修饰 country。三层定语从句嵌套是本句最大难点。
译文这就是为什么最近由大量维护工程造成的严重延误让整个铁路行业陷入混乱，而且偏偏发生在大多数人出门度假的时节；在一个旅游业占国内生产总值 10% 的国家，这对经济影响重大。
考点This is why... 句型中 why 引导表语从句，表示"这就是……的原因" · which 引导非限制性定语从句指代整个主句内容；where 引导定语从句修饰地点名词 country
2Ferrovie dello Stato Italiane, the publicly controlled group that owns train operator Trenitalia and the national train network RFI, said 23 per cent of all high-speed trains it operated were late in 2023.
主干主语：Ferrovie dello Stato Italiane；谓语：said；宾语：省略 that 的宾语从句（23 per cent of all high-speed trains were late）
结构主语后接长同位语 the publicly controlled group...，其中 that 引导定语从句修饰 group，从句内 owns 后接两个并列宾语 Trenitalia 和 RFI。谓语 said 后接省略 that 的宾语从句，从句中 it operated 是省略关系词的定语从句修饰 trains，it 指代 Ferrovie。主语与谓语被长同位语隔开，易造成主谓识别困难。
译文意大利国家铁路公司是一家国有控股集团，旗下拥有列车运营商 Trenitalia 和全国铁路网运营商 RFI。该公司表示，2023 年其运营的高速列车中有 23% 出现晚点。
考点主谓之间插入长同位语，阅读时需先抓主句主谓 · said 后宾语从句省略 that；it operated 为省略关系代词的定语从句
3Transport economist Andrea Giuricin said the planned investments would bring improvements but disruptions in the meantime were inevitable.
主干主语：Andrea Giuricin；谓语：said；宾语：省略 that 的宾语从句（内含 but 连接的两个并列分句）
结构Transport economist 是 Andrea Giuricin 的同位语（头衔前置，无冠词）。said 后接省略 that 的宾语从句，从句由 but 连接两个并列分句：the planned investments would bring improvements 与 disruptions were inevitable，in the meantime 作时间状语插入后一分句。注意 but 连接的是从句内部成分而非主句。
译文运输经济学家安德烈·朱里钦表示，计划中的投资会带来改善，但与此同时，运营中断在所难免。
考点头衔+人名的同位语结构，翻译时需调整语序 · 宾语从句内部 but 连接的并列转折，in the meantime 意为"与此同时、在此期间"
4“We have a mixed system, there is no spare capacity and as soon as there’s a hiccup on the line, the situation becomes highly complex,” he said.
主干主句：he said；引语为三个并列分句：We have a mixed system / there is no spare capacity / the situation becomes highly complex
结构直接引语由三个并列分句构成，第三分句含 as soon as 引导的时间状语从句，表示"一……就……"。hiccup 本义"打嗝"，此处为比喻义"小故障、小波折"，是熟词僻义考点。on the line 指"在铁路线上"。引语后置主句 he said 为倒装式归属结构。
译文他说："我们采用的是混合系统，没有备用运力，所以只要线路上出一点小故障，整个局面就会变得极其复杂。"
考点as soon as 引导时间状语从句，主句用一般现在时表将来 · hiccup 熟词僻义：小问题、小故障；直接引语中并列分句的层次划分
5It will allow for a reduction of the distance between high-speed trains travelling on the same line at any given time, which should mean a significant increase in capacity and traffic fluidity, according to Giuricin.
主干主语：It；谓语：will allow for；宾语：a reduction of the distance
结构It 指代上文的 satellite signalling 技术。between high-speed trains... 为介词短语修饰 distance，其中 travelling on the same line at any given time 是现在分词短语作后置定语修饰 trains。which 引导非限制性定语从句，指代"缩短车距"这整件事。according to Giuricin 为插入性状语。at any given time 意为"在任何特定时刻"。
译文朱里钦指出，这项技术将缩短同一线路上同时运行的高速列车之间的间距，而这意味着运力和通行流畅度都将显著提升。
考点allow for 意为"使……成为可能、允许"，后接名词 · which 引导非限制性定语从句指代前文整个情况；at any given time 为固定搭配