九十的用法和樣例：
例句
-
天才的百分之一是靈感，百分之九十九是血汗。
Genius is one per cent inspiration and ninety- nine per cent perspiration. -
他準有九十歲了。
He must be going on for ninety. -
他生于十九世紀九十年代。
He was born in the nineties of the nineteen century. -
九十多個(gè)國家批準了一項禁止使用這些化學(xué)品的協(xié)議。
Over ninety countries ratify an agreement to ban the use of these chemicals.
