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俄罗斯世界杯四强已锁定，德国、巴西、西班牙的出局也是让很多球迷感觉凉凉了，但是作为四年一度的足球盛会，其热度仍是居高不下，小编也很是好奇，今年会是哪支球队能赢下这座奖杯。
关于球赛呢，小编作为一个业余业余加业余的伪球迷就不献丑掰扯了，但是对于本届世界杯上的设计亮点，小编还是有些信息可以跟大家共享的，这次来看看每届世界杯都不一样的足球吧。
The typical soccer ball looks like this. Black and white with a bunch of these panels. But that's not what the World Cup balls look like. So, what's going on?
典型足球由黑白两色的嵌板构成。然而，世界杯的足球可不长这样，而且每次都有变化。原来，其中某些变化效果不佳——在解决某些问题的同时，引发了更多新问题。
First things first, you want a soccer ball to be as spherical as possible. In the old days, we had balls that had the bucky ball shape, the Epcot Center shape, 20 hexagons, the 12 pentagons. And that was a very good approximation to a sphere. But starting in 2006 with the World Cup in Germany...there were more creative ways to make a sphere.
首先，你希望足球尽可能接近球体。以前，我们有过巴基球、艾波卡特中心、20个六边形、12个五角形等形状的足球，这些形状非常接近球体。但从2006年的德国世界杯开始，人们有了更多制造球体的创新方法。
New technology enables Adidas to start designing the balls with fewer panels. Which created a serious problem. Because fewer panels means fewer seams. And, more importantly, a smoother surface.
阿迪达斯利用新技术，设计出嵌板数量较少的足球，这带来了一个严重问题。嵌板数量较少意味着缝合线较少，意味着足球表面更光滑。
If the ball gets too smooth, the air resistance goes up. It's like kicking a beach ball." And that's exactly what happened with the 2006 Teamgeist ball. Players complained the ball didn't go where they expected it to.
足球太光滑的话，空气阻力会上升，就像踢一个沙滩球似的。这就是2006年世界杯的“团队之星”（足球名称）的问题。当时，球员抱怨足球踢不到它应该到的地方。
So, in 2010, Adidas compensated by adding some texture to roughen up the surface. However, Jabulani was a spectacular failure because it was not rough enough. When the ball would be kicked at certain speeds, you'd notice it would slow down dramatically part way through the flight.
于是，在2010年，阿迪达斯通过增加纹理，让足球表面变得粗糙些。然而，“普天同庆”款足球是个严重的失败品，因为它还不够粗糙。当以特定速度踢球时，它在飞行过程中会半道突然迅速减速。
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