有个科学家想了解种子到底能承受多大的压力而做了一个实验。他先在埋有松树种子的泥土上加一块石头,结果种子发芽后,松苗从石块与泥土之间的缝隙弯弯曲曲地伸出来了。科学家又在嫩芽的茎上绑上一根铁丝,一段时间后,发现铁丝竟被树苗挤断,树苗的干上有一道深深的痕,但松 One scientist wondered how much pressure the seeds can withstand. He first added a stone to the soil where the seeds of pine trees were buried. As a result, the seedlings sprouted from the cracks between the stones and the soil. Scientists and shoots in the stems tied to a wire, after a period of time, found that the wire was actually squeezed saplings, saplings have a deep trace of the stem, but pine