hypergeometric differential equation

例句：

1. 1. The probability of rain is higherin the afternoon than in the morning.
   下午下雨的概率比上午高。
2. 2. Thenumber of students who passedthe exam was significantly higher thanexpected.
   通过考试的学生数量明显高于预期。
3. 3.The ratio of males to females in thispopulation is hypergeometrically distributed.
   这个人口中男性与女性的比例是超几何分布的。