You might think that its function is to make you more - a better cyclist but that's not its only function.

你也许只知道它的作用是--,使你成为一个更好的自行车手,但这并不是它的唯一功能

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It's a little redundant, admittedly, but I include not the same function, but just its prototype, as I say in the comment here.

它确实是有点长的，但是我包含的不是同一个函数，而只是一个原型，就像我这里的注释所说的。

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