每包香烟上都有健康警告。

There's a health ___warning on every pack of cigarettes.

恶劣的暴风雨可能毫无预警地袭来。

A bad storm can strike without ___warning.

只是一句警告——这个地区的餐馆可能非常昂贵。

Just a word of ___warning - restaurants in this area can be very expensive.