93. He Rides His Bike 他骑自行车

His left foot is on the pedal. His right foot is on the ground. He pushes down on the pedal. He takes his right foot off the ground. He puts it on the pedal. The pedals start to go around. They go around in a circle. His knees go up and down. The bicycle rolls forward.

他的左脚踩在踏板上。他的右脚在地上。他踩下踏板。他把右脚抬离地面。他把它放在踏板上。踏板开始转动。它们绕着一圈。他的膝盖上下起伏。自行车向前滚动。