rubicon

• 指决定性界限或临界点，一旦越过便导致不可逆转的决定或承诺；也特指凯撒越过卢比孔河这一历史事件。

A proper noun referring to a boundary or limit that, once crossed, leads to an irreversible decision or commitment, often used in historical or figurative contexts.

不可数 · 专有名词

1. Historical riverC1formal

   A small river in northern Italy that served as the boundary between Italy and Gaul in ancient times. Julius Caesar's crossing of this river in 49 BC with his army was considered an act of war, leading to the Roman Civil War.

   卢比孔河

   • Caesar's decision to cross the Rubicon was a pivotal moment in Roman history.
   • The Rubicon marked the limit of Caesar's legal authority.
   • Historians still debate the exact location of the ancient Rubicon.

2. Point of no returnB2formal

   A figurative boundary or limit that, once crossed, commits a person to a course of action that cannot be reversed.

   不归点

   • By signing the contract, he crossed the Rubicon and could not back out.
   • The company's decision to launch the product was its Rubicon.
   • She knew that confessing her feelings would be crossing the Rubicon.

   同义词point of no return