短句听写:未知数_短句

短句听写

Hints:
SARS

Many experts thought that the global economy would improve this year, but with the start of war in Iraq and the outbreak of SARS, all bets are off.

许多专家以为今年全球经济会好转，但随着伊拉克战争开打以及 SARS的爆发，一切都成了未知数。