The third wheel makes the bike easier to balance.

第三个轮子使自行车更容易保持平衡。

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To balance on a bike we need somatic tacit knowledge, but to ride it in traffic we need collective tacit knowledge.

为了在自行车上取得平衡，我们需要躯体隐性知识，此外为了在车流中骑行，我们还需要集体隐性知识。

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The first time when I rode the bike, I lost my balance quickly and nearly fell down, my father tried to keep my balance, so that I did not fell to the ground.

当我第一次骑自行车，我很快就失去了平衡，几乎摔倒了，我的父亲试图保持平衡，所以我没有倒在地上。

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This month Cohen will add the City of Boston, which is launching a 600-bike system (sponsored in part by athletic-shoe maker New Balance).

FORBES: A New Way For New Yorkers to Battle Fellow Commuters