摘要

<正>印度卡西族的先民创造了不会腐朽的活根桥。这些桥是用活树的气生根人工编制而成的,随着时间的推移,成熟的气生根会长出新的气生根,桥也会变得越来越坚固。In the mountainous state of Meghalaya in India lives a truly fascinating phenomenon—living bridges. These suspension bridges have been cultivated (培育)over many years.