bicycle：n.自行车；脚踏车；v.骑自行车；
bicycle的过去式： bicycled；过去分词： bicycled
The height of the bicycle seat is adjustable.
这辆自行车车座的高度可以调节。
She wheeled her bicycle across the road.
她推着自行车穿过了马路。
He got on his bicycle and rode off.
他骑上自行车走了。
温馨提示：
