To find the reason why a drill might bring on a racing heart, Karibe divided the volunteers into low fear and high fear groups based on how much they feared a trip to the dentist.

为了找出钻头可能导致心跳加速的原因，Karibe 根据志愿者对看牙医的恐惧程度，将他们分为低恐惧组和高恐惧组。

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It sounds like the opposite of high-tech engineering, but it's not. High-end racing bikes built of bamboo. Listen to the podcast. Today, on engineering Works!

听起来像是与高科技的工程学相悖，其实不是。由竹子制成的高级赛车。听一下今天的“工程杰作”的播客！

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For those wanting to get even closer to the action, there's a thrilling chance to follow the race in China Team's high-speed support boat, or even to take a seat on the AC45 racing yacht itself!

对于那些想有更近距离交流的拥护者们，他们有一次激动人心的机会乘坐中国之队的高速船全程跟随观摩比赛，甚至可以亲自坐上AC45！

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And they now compete in straight-line drags or on an oval course, reaching speeds as high as 75 mph, on sleds that are only slightly modified for racing.

WSJ: Snowmobile Riders Race Over Water on Minnesota Lakes

"It's just another type of feeling--it's different, " says Platts, who works on Ford's racing and high-performance teams.

FORBES: Magazine Article

Johnny Murtagh confirmed his position in racing's elite with his second Derby victory, this time on High Chaparral.

BBC: Johnny Murtagh