做事不能有始有终是孩子缺乏意志力的一种表现。这样的孩子往往心理比较脆弱,意志力较差,情绪不稳,注意力也不太集中和长久。从“水”到“蒸汽”水温升到99摄氏度,还不是开水,其价值有限;若再添一把火,在99摄氏度的基础上再升高1摄氏度,就会使水沸腾,并产生大量蒸汽来开动机器,从而获得巨大的经济效益。这被称为“沸腾效应”。 Doing things can not start and end is a manifestation of children’s lack of willpower. Such children are often mentally fragile, weak willpower, emotional instability, attention is not too focused and long. From “water ” to “steam ” water temperature rose to 99 degrees Celsius, is not boiling water, its value is limited; if you add a fire on the basis of 99 degrees Celsius and then increased by 1 degree Celsius, it will make water Boiling, and generate a lot of steam to start the machine, thus obtaining huge economic benefits. This is called “Boiling effect”.