Traveling around the world with children is difficult enough, but attempting it without using motorizedtransport is even more of a challenge.
带着孩子环游世界已经足够难的了，但是尝试着不使用机动交通设备带着孩子环游世界是一个更大的挑战。
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Contrary to our images of a motorized blitzkrieg, 75% of German transport was horse-drawn (think how much hay and how many hay wagons are needed to feed 750, 000 horses.)
In most Third World cities, the low income level forbids a high car ownership ratio and, thus, the alternative to non-motorized modes is public transport.