pedaling
vt.& vi.
踩自行车的踏板（pedal的现在分词形式）;
例句:
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He is said to have thrown off pursuers by pedaling across the Wisconsin state line.
据说他骑车越过威斯康星州界，摆脱了追捕他的人。
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The back pedaling brake of the bike is out of order.
这辆自行车的倒轮闸失灵了.
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Suspension system effectively reduces reacting force of pedaling.
避震系统可以有效的减缓踩踏时的反作用力.
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That's what kept his son pedaling in the cold Italian rain.
来自WSJ
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Now they're just back-pedaling.
来自CNN
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A bicyclist confronting a head wind...tries to maintain his customary...pedaling cadence by shifting gears.
来自Scientific American