1930年,“荷兰榆树病”横扫了密歇根州的榆树种植区,农场周边的榆树几乎死光,仅剩下那棵身缠铁圈饱受束缚之苦的榆树,人们以为它肯定活不长了。可随着时间的推移,它却一年比一年茂盛。植物学家经过研究得出结论:这棵榆树是从锈蚀的铁圈上吸收了大量的铁元素,才幸免于难的。本来,锈迹斑斑的铁圈嵌进榆树的身 In 1930, the Dutch elm tree swept across the elm fields in Michigan. The elms around the farm almost died out, leaving only the elm tree that was so strapped to the hoops that people thought it would certainly not survive Long It can flourish year after year, over time. Botanists have concluded after study: this elm tree is from the corrosion of the iron ring to absorb a lot of iron, was spared. Originally, rusty iron ring embedded in elm body