Apr. 14, 2009

What do you realize?

After the above three kinds of experiments, what do you see? And what do you realize?

• At the limited time, the hair dryer blew away all the sand, but only a small portion of the soil of the sand was blown away in soil of grass. Three days later, I found that the wet sand all dry, and soil around the grass moist.在相同的时间内，电吹风吹走了全部的沙土，但是有草根的土壤只有少部分的​沙土被吹走。三天后，我发现浇了水的沙子全部都干了，而草根周围的泥土是潮湿的。
  Apr. 15, 2009

   
  
  

• The knowledge Ilearnt only in the textbooks previously . After the trial, I realized the importance of practice, let me feel the difference between sand and grass. Dry sand, grass in soil is still wet.这些知识以前只是停留在课本上。做完这次试验，我才意识到实践的重要性，让我​亲身感受到沙土和草根的区别。沙土晒干，而有草根的土壤还很湿润。
  Apr. 15, 2009

   
  
  

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