与Mobius带相比较，克莱因瓶同样地有趣和巧妙，我们不能使用它，因为我们不能通过它们来定义通量。
OK, so as much as Mobius strips and Klein-bottles are exciting and really cool, well, we can't use them in this class because we can't define flux through them.
警用扫描仪的作用，非常有趣，因为救护车，和消防车，还有警车不断地，汇报它们的所在地和它们所做的事。
And what was happening on the police scanner was really interesting because you had ambulances and fire trucks and police cars constantly reporting where they are and what they're doing.
这些儿童读物里有很多比较好的比喻，寓言，短篇故事和神话传说，因为它们通俗易懂而且同时还有一些有趣的信息。
Those containing many parables, fables, short stories, and legends are good because they are easy to read and carry interesting messages as well.
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