正确答案：　Though the little grass has never been said to be Herculean, the power it shows is matchless in the world. It is an invisible force of life. So long as there is life, the force will show itself. The rock above it is not heavy enough to prevent the seed from growing, because it is a force that keeps growing over a period of time, because it is an elastic force that can shrink and expand, because it is a tenacious force that will not stop growing until it is grown.The seed does not choose to fall on fertile land but in debris, instead. The seed with life is never pessimistic or sad, for it has undergone resistance and pressure. The grass that begins to fight its way out right after its birth is strong and tenacious, and only that grass has the right to smile with pride at the potted plants in glassed green houses.