求翻译：登山單輪車是ㄧ種極限運動，它困難的地方是在單輪車上保持平衡，但它和登山單車一樣，要在崎嶇的地方騎乘，但也因為這種不穩定的交通工具能騎到無法想像的地方，所以也吸引許多人挑戰。是什么意思？

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Mountain bike ride single polling cart is the extreme sports, it difficult places is on a single disc cart on balance, but it and mountain bike ride cycling, to the bumpy place riding, but also because this instability of the vehicle to perforation to cannot imagine, so it can also attract many chal

The mountaineering monowheel vehicle is ㄧ the kind of limit movement, its difficult place is maintains the balance on the monowheel vehicle, but it and the mountaineering bicycle are same, must ride in the rugged place rides, but because also this kind of unstable transportation vehicle can ride to

Mountain unicycles are always kind of extreme sport, its difficulty was balancing on unicycles, but it, like mountain bike, on the rough ride, but also because of the instability of transportation can ride to unimaginable places, so it attracted a number of challenges.

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