Primary school textbooks have a text called the crow to drink, talking about a thirsty crow and saw in front of a plastic water cups which installed some water, because the crow's mouth was not long enough to drink water, and finally thought crow one way threw stones towards the cup, as part of the cup stones occupy space, so stagnant it rose, crow finally drink the water.
But today it was found that the crow can drink water in addition to the amount of water in the cup, but also the shape of the cup has a great relationship. The more wide mouth of the cup, in fact, the more easy to let the crow drink water.
In fact, life will encounter problems such as crow drank water, do things, to comprehensive consideration, often the result of one thing is determined by many factors that you consider enough, you will get good results.
