diversify
- vt. 使多样化，使变化；增加产品种类以扩大
考试真题
- In the past few years, MathCounts added two new middle school programs to try to diversify its participant pool—the National Math Club and the Math Video Challenge.
出自-2017年6月阅读原文
- In the past few years, Math Counts added two new middle school programs to try to diversify its participant pool—the National Math Club and the Math video Challenge.
2017年6月六级真题（第三套）阅读 Section B