What is the most efficient way to pump your bicycle tire?

给自行车轮胎打气的最有效率的方法是什么？

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Picture a bicycle with a two-wheeled carriage in place of a back tire.

描述把一辆自行车的后轮改成双轮的造型。

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My bicycle has a flat tire.

我的自行车有一个胎爆了。

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I got a flat tire of the rear wheel of my bicycle.

我自行车的后轮车胎没气了。

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My bicycle has got a flat tire.

我的自行车没气了。

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My bicycle has got a flat tire.

我的自行车没气了。

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