Mountain bicycles are great on pot-holed city streets.

登山自行车很适合凹凹坑坑的城市街道。

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It is quite an established fact that mountain bicycles are aptly designed following the present trend and demand.

这是相当不争的事实山地自行车是恰当的设计之后，目前的趋势和需求。

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Mountain bikes are among the strongest and most rugged bicycles that you can find.

山地自行车是最强大和最坚固耐用的自行车，你可以找到。

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Estimates of the numbers of people who partake each week vary from one million to two million, and the city fills with mountain bikes, road bikes, fold-up bicycles and children on training bikes.

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Bicycles come in many different forms: racing, mountain, touring, hybrid, track, utility, cruiser, fixed-wheel, dirt-jumper, porteur, BMX.

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