If children's activities are in line with their internal needs, their performance will enable us to develop what they need.
假如孩子们的活动正好和他的内在需求相配合,孩子的表现会让我们他的发展所需。
粮食安全是国家安全的基石。
Science and everyday life cannot and should not be separated.
自然在其现象中向我们展示了无限的多样性,但也展示了令人钦佩的简单性。
"The truth is rarely pure and never simple."
质量不是理论;它是一种实践。