即将于本次车展上首发的50余款新车中，超过一半属于豪华车或高性能车的类别。

Of the 50-plus vehicle debuts at the 2011 LA Auto Show, more than half were in the performance and luxury vehicle category.

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汽车制造商已认真考虑使用音响引擎使扰人的鸣笛变得悦耳，这对高性能车尤其重要。

Carmakers already take engine noises seriously enough to use acoustic engineers to tune exhaust pipes, especially for high-performance cars.

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在下面的部分中，我将介绍前面提到过的那个简单实例，它读取一个购物车并进行分析，找出提高性能的模式。

In the following section, I will introduce the already mentioned simple example of reading a shopping cart and analyzing it to find patterns that improve performance.

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