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And the countdown is on as Brazil gets set to host the World Cup next week.
巴西準備主辦下週的世界盃足球賽，時間也已進入了倒數階段。

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Now, football fans are gearing up for what is the world's biggest sporting event.
足球迷都已準備好迎接這場全世界最盛大的體育賽事。

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Now, there's [there are] still concerns over whether everything will be finished on time.
目前對於一切工作是否能夠如期完成仍然有些擔憂。

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While experts will be looking to ensure the stadiums are in ship shape, players will be keeping their eyes on the ball.
專家會確保體育場館一切就緒，球員則把目光集中在球上。

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Adidas has made some key design changes to this year's official football,
愛迪達為今年的正式用球做了些重大的設計改變，

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and Jim Clancy looks at the science behind the Brazuca.
吉姆．克蘭西為我們解析 Brazuca 足球背後的科學。

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Thirty-two teams will compete for the World Cup at 12 different stadiums across Brazil.
三十二支球隊將在巴西各地十二座不同場館競逐世界盃。

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But one thing will be the same for all of them, the ball, a new one.
不過，有一件事對所有隊伍都是一樣的，也就是他們所踢的球，是新式的球。

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Adidas has made some changes this time around that could have a major impact.
這一次，愛迪達做了些可能會造成重大影響的改變。

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The new ball, called the Brazuca, will have only six panels compared to eight in the one used in South Africa, and each will be shaped like ninja throwing stars.
相較於南非世界盃的用球有八塊球皮嵌片，這款稱為 Brazuca 的新球只有六塊，每塊嵌片的形狀都像是忍者的手裡劍。

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The texture of the ball is a bit rougher, with tiny bumps, and longer, deeper seams.
新球的質感比較粗，有突起的小顆粒，接縫也比較長又比較深。

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Wind tunnels were used to test the ball's air resistance, or drag.
這款球的空氣阻力利用風洞進行了測試。

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Despite the reduced number of panels used, the total length of the seams to put together the panels became longer,
儘管使用的嵌片數量變少，接合嵌片的接縫總長度卻變得較長，

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which makes the range of the ball speed that creates low air resistance become wider.
所以造就低空氣阻力的球速範圍就變得更廣了。

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The changes should make this ball fly faster with less power.
這些改變應可讓這款球只需較小的力量即可飛得更快。

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Adidas says this will improve touch and accuracy, and players are advised not to kick the ball so hard.
愛迪達表示，如此一來將可改善觸球與準確度，而且他們也建議球員踢球不要太大力。

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The new design should also cut down on knuckling --
這種新式的設計應該也有助於減少蝴蝶球的效果，

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sudden jerky direction changes caused when the ball spins very little or not at all.
也就是球的旋轉幅度極小或者全然不旋轉的時候所造成的瞬間方向詭變。

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Because Brazuca has lower lift force when it flies, the so-called knuckling effect will be hard to achieve with this ball.
由於 Brazuca 飛行時的升力比較小，因此這款球比較難達到所謂的蝴蝶球效應。

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Now, this could be good news for goalkeepers,
這點對於守門員而言應該是好消息，

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but bad news for someone like Cristiano Ronaldo, who likes to use the effect to score.
但是對於 C 羅這種喜歡利用這種效應得分的球員而言卻是壞消息。

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On the other hand, the increased spin helps to create the effect that makes the ball curve.
另一方面，旋轉度增加有助於產生讓球弧線飛行的效應。

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So more players should be able to bend it like Beckham.
所以，應該會有更多的球員能夠像貝克漢一樣踢出弧線球。