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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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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Well, the range of bicycles is enormous — there are racing bikes, touring bikes, mountain bikes or just plain ordinary bikes for riding round town.

自行车的种类很多，有脚踏车，游览车，山地车或者普通的平地车用来在镇里骑。

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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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