"一个孩子可以教给一个成人三件事：无缘无故地快乐，总是忙于某事，并且知道如何全力以赴地追求自己渴望的东西。"

Simplified Meaning:

Children show us valuable lessons. They sometimes feel joy simply because they exist, without needing a reason or a special event. For example, a child might giggle just because they see a butterfly. Adults can learn to appreciate small moments and find happiness in the simple things around them. Kids also seem like they are always on the move, finding things to do constantly. Whether it’s drawing, playing, or exploring, they stay active and curious. Adults can take this as encouragement to stay engaged in activities, hobbies, or learning new things instead of getting stuck in routines. Lastly, children are not shy about asking strongly for what they want. Think of a child who keeps asking for a toy in a store with all the energy they have. This teaches us the importance of being clear and persistent about our desires and goals in life, making sure we try our best to achieve them. By applying these behaviors, adults can find more joy, stay active, and be more determined.