按照这种增长速度，到明年二月份，汽车保有量有望突破500万辆，到时平均交通运行速度将降低至曾经的脚踏自行车了。
At this rate, the number of cars in the city is expected to pass the 5m mark by February, while the average speed of the traffic slows ever closer to bicycle pace.
他建议患者骑三轮车，或使用固定脚踏车或训练器——这是设备将公路自行车转变为原地脚踏车。
He recommends that patients ride tricycles, or use stationary bikes or trainers - devices that turn road bikes into stationary ones.
仅仅是一些自行车的铃铛声和脚踏板转动的咔哒声。
Just a few cyclist's bell tings and the quiet clicks of the pedals running.
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