When did it become accepted wisdom that students should be able to name the 13th president of the United Sates but be utterly overwhelmed by a broken bike chain?

学生们应当说出美国第13任总统的名字，而面对一根断裂的自行车链条时却不知所措，这是什么时候形成的共识？

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When did it become accepted wisdom that students should be able to name the 13th president of the United States but be utterly overwhelmed by a broken bike chain?

学生们应当能说出美国第13任总统的名字，但面对一根断裂的自行车链条时却不知所措。这是什么时候形成的共识？

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The lead biker broke his bike chain.

那位领先的自行车手车链子断了。

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Chris Hamelin, whose bike chain snapped, was the best island performer when he accumulated a sixth and two seventh places in the Rookie 600 class.

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His legs weren't feeling great, and then his bike busted its chain.

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There's no chain on the bike -- instead it relies on a shaft drive to move the wheels.

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