rubicon
n. 卢比孔河（意大利北部河流）
例句
Today we cross the Rubicon. There is no going back.
今天我们要破釜沉舟，背水一战了。
《牛津词典》
He's crossed the Rubicon with regard to the use of military force as an option.
对于选择使用武力这一点来说，他已经越过了雷池。
《柯林斯英汉双解大词典》
There is a kind of courage, called the Rubicon, bite.
有一种勇气，叫破釜沉舟，背水一战。
