我们在吃饼干时,常常发现饼干容易碎裂。可是,你是否想过:饼干为何容易碎裂?或许有人撇撇嘴说,这个问题还不简单吗?饼干因为干,所以容易碎。的确是这个道理,但是更深的科学道理未必人人都知道。科学家最近才弄明白饼干容易碎的物理学原理。这个原理是英国科学家发现的,他们的研 When we eat biscuits, we often find that crackers break easily. However, have you ever wondered: Why are biscuits prone to cracking? Maybe someone would pout that the problem is not simple? Crackers are easy to break because they are dry. This is true, but deeper scientific reasons may not be known to everyone. Scientists have only recently learned the physics of crackers. This principle was discovered by British scientists. Their research