幽默是儿童书籍中的强大工具;它可以让严肃的话题变得易于接受。
Humor is a powerful tool in children's books; it can make serious topics accessible.
The training and improvement of labor are effective ways to increase productivity.
"In painting, the hand must follow the eye, and the eye must follow the soul."
物理学的美丽在于它能够用简单的原理解释复杂的事物。