有一种植物叫卷柏(又叫九死还魂草),它的奇特之处是会行走。当它感觉到缺乏水分时,就会把根拔出来,卷成一个圆球。由于体轻风会把卷柏吹走。当遇到水分充足的地方,卷柏就会迅速地把根扎下去,暂时安居下来。科学家将卷柏周围用挡板围住,使它不能“行走”。如此反复多次之后,卷柏知道自己再也不能四处行走了,于是便将根深深地扎进原地的土壤里。结果,卷柏长得比以往任何时候都好。 There is a plant called Selaginella (also known as Nine Dead Soul Grass), its peculiarity is to walk. When it senses a lack of moisture, it pulls out the root and rolls it into a ball. Because of body breeze will roll cypress. When confronted with adequate water, Selaginella will quickly take root and settle down temporarily. Scientists surrounded the sieve with baffles so that it can not “walk”. So repeated several times, the cypress knows that they can no longer walk around, so they will root deep into the soil of the place. As a result, the cypress has grown better than ever.