For those of you strongly committed to riding your bikes year-round, consider cyclo-cross training since it combines running with cycling and lets you hone your handling skills.
对那些决意全年骑车的车手,可考虑一下公路越野训练,因为它结合了跑步和骑车,而且增强你的控车技能。
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PZS nanotubes had a molecular structure of highly cross-linked cyclo-matrix.