The mix of activities varies over time as the emphasis and priorities of the project change.

活动的混合会随着项目的重点和优先权的变更而随时变化。

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By giving the players a story and a number of quests, games can be built that involve a mix of physical and virtual activities.

通过给玩家一个故事或者几个小测试，人们可以轻松的创建一个融合了物理和虚拟活动的游戏。

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Buy ready-made plans, take online classes, check out software or video lessons, use an "unschooling" approach that teaches through real-life activities or incorporate a mix of all of these.

可以购买一些现成的课程计划、网络课程、软件或音像制品，也可以使用“非校园化的”方式，例如现实活动或将以上方法集中起来。

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Much of the city has been re-zoned to allow a better mix of offices (again in short supply), industrial activities and housing.

ECONOMIST: Michael Bloomberg sets out a bold new vision for his city

With the original voice of Charlie Brown taking you through the interactive storybook, with minigames, activities, and nostalgia at every touch, this is a delightful mix of old and new blended together perfectly.

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