我告诉他们我常跑自行车道，因为我能感觉出柏油路面比混凝土路面更加柔软。
I have told them that I run in the bike lanes of roads because asphalt is softer than concrete.
结构由几个钢筋混凝土波浪状拱构成，支撑起一条四车道的公路。
The structure comprises several arching waves of reinforced concrete, which support a four-lane highway.
在北欧大部分地区，在自行车道上有混凝土缓冲器，一排树或停泊的车辆，这些屏障可以保护骑自行车的人不被汽车撞到。
In much of northern Europe, cyclists commute on lanes that are protected from cars by concrete buffers, rows of trees or parked cars.
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