被包围英语翻译,被包围用英语怎么说

at eleventh hour最后一刻

at eleventh hour千万不要翻译为在11个小时，这是一个固定习语

The patrol was almost surrounded and then, at the eleventh hour, reinforcements arrived.

这支巡逻队几乎被包围了，正在危急之际，援军赶到了。