Apr. 14, 2009

Learn from each other

Friends, stick your harvests and learn from each other, so that you add more knowledge
伙伴们，把你们的收获都贴出来，互相学习，让知识积少成多吧

• I found that the grass has a fixed role of water, there is more humid on the grass areas. We have measured the exposed roots, they are three meters long, The teacher said, some roots buried underground are longer and deeper. He likes mother's arms, clinging tightly to the soil, so it will be difficult to drain the water and soil.
  我发现了草有固定水分的作用，有草的地方就比较潮湿，我们还量了裸露的树根，有３米多​长呢，老师说，埋在地下的部分更长，在地底下扎得更深，他象母亲的怀抱，紧紧地抱住土​壤，所以，水土就不容易流失了。
  
  Apr. 14, 2009

   
  
  

• 1
• 2