point of no return

短语

该悬崖勒马的时候, 该急流勇退的时候, 该罢手的时候

发音

其它

词形变化

points of no return 复数 points of no return

别名

PONR PNR

释义与例句

n.
  1. 1.

    The point in an aircraft's flight when there is insufficient fuel to reverse direction and return to the place of origin.

    航线临界点

    不归路

    航空 商务 工程
  2. 2.

    The point in any process or sequence of events where some development becomes inevitable.

    比喻

词汇关系

名词

同义词 1

rubicon

上位词 4

line contrast demarcation dividing line

词源

The expression originated in air navigation planning. The point along the planned flight path beyond which an aircraft will no longer be capable of returning to the takeoff airfield or an alternate airfield due to insufficient fuel is calculated before takeoff. This is mandatory for overwater flights or flights without alternates on route.

来源：wiktionary