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.
在过去的几年里，数学竞赛MathCounts增加了两个新的中学项目（国家数学俱乐部和数学视频挑战），试图使其参与者群体多样化。
The main challenge lies in managing resources by placing limits on the number of outstanding overlapped calls so that the non-paged pool is not exhausted.
通过设置合理的进行守候的重叠调用的数量，防止出现未分页内存池被耗尽，这才是最主要的挑战。
Every country has its own problems of education and all could help resolve them by learning from each other; employment, too, is a common economic challenge and countries could pool their experience.
每个国家都有自己的教育问题，各国可以通过互相学习解决问题。就业也是一个共同的经济挑战，各国应当集思广益。
One major challenge is their being segregated horizontally by the existing long swimming pool, and vertically by a 3m level-change between their living-room floors.
该项目一个主要的挑战是他们在水平面上被现有的长游泳池隔离，垂直上他们起居室的地板有3米的水平落差。
One major challenge is their being segregated horizontally by the existing long swimming pool, and vertically by a 3m level-change between their living-room floors.
该项目一个主要的挑战是他们在水平面上被现有的长游泳池隔离，垂直上他们起居室的地板有3米的水平落差。
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