学习是系统中产生的任何变化,这种变化或多或少会永久性地改变其适应环境的能力。
一本好的图画书应该是文字和图像的合作,彼此相互增强。
Sustainable development requires us to balance economic growth with environmental protection.
Quality is not a assurance; it is a proof.
The truth is often hidden in the spaces between words, in the silence that speaks louder than any sound.