And no one really knows why that happened.

没有人真正知道为什么会发生暴跌。

youdao

Tabasco sauce or anything hot is great during a hangover and no one really knows why.

辣沙司或热的东西对于宿醉效果很好，没有人知道为什么。

youdao

With so much bad debt out there - and no one really knows how much there is - Banks around the world have become extremely risk-averse.

有这么多坏账——没人真正知道数字究竟有多大——全世界的银行开始变得不再愿意承担风险。

youdao

Most markets are now hostage to the fiscal cliff debate as it is now risk on or risk off at any moment and no one really knows how the situation will turn out.

FORBES: Most Survey Participants See Higher Gold Prices Next Week

But there have been numerous official contradictory statements recently over when that trial will begin, and no-one really knows for now, says the BBC's Rana Jawad in Tripoli.

BBC: Saif al-Islam Gaddafi appears in Libya court

Legend has it that John Wilkes Booth was hiding outside in the shadows near the front door of Ford's as the presidential carriage rocked down the uneven dirt street and slowed to a stop, but no one really knows where he was at that precise moment.

NPR: Excerpt: 'Manhunt'