因为可能的主题在数量上几乎是无限的，所以我们重点关注最有趣和最有用的应用程序和工具的一个示例，并解释技术的基本原理。
Because the number of possible topics is practically limitless, we focus on a sample of the most interesting and useful applications and tools and explain the basic principles of technology.
我们的时光机还生产了热卖的的帕尔米奇（一种安装有定位传感系统的毛绒米老鼠），它使迪斯尼主题公园的游客们在漫长的队伍里等待乘骑游乐设施时，感到无限快乐。
Our time machines also produced the hot-selling Pal Mickey location-sensitive toy that entertained theme park guests while they lined up to ride our attractions.
许多夏天的活动，比如野餐和BBQ，都是以无限的食物为主题的。
Many summer activities, like picnics and barbecues, revolve around an unlimited spread of food.
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