童年时期注意力的发展是自我调节和学业成就的基础。
能量守恒定律不仅是一条经验法则,更是思维的必然要求。
A person may cause evil to others not only by his actions but by his inaction, and in either case, he is justly accountable to them for the injury.
You don't get another chance, life is no Nintendo game.