Charles Brigham was 28 when he got on his bike to go on an ecological tour of the world but could be 33 by the time he returns home to Madison, Wisconsin, in the US.

• 查尔斯．布利罕骑上自行车展开环球生态之旅时是二十八岁，但等他返回美国威斯康辛州麦迪森的老家时可能已经三十三岁了。