possible的名词形式是possibility。possibility的意思是机会，契机。possibility的例句：Tax on food has become a very real possibility（极有可能征收食物税）。

possibility的例句：We were not in the least worried about the possibility that sweets could rot the teeth （我们以前完全不担心吃糖果有可能会蛀牙）；There were several possibilities open to each manufacturer（每个制造商都可以有几种不同的选择）。