所以,在收成好的年头,百姓就仁义善良;遇到荒年,那么百姓也会吝啬而凶恶。 
The beauty of computational complexity lies in its ability to classify problems based on their inherent difficulty.
我们肩上背负的责任重在,必须小心谨慎地了解可能可能会泯灭孩子精神的原因,并要融入孩子的世界。