The telegraph is not only an invention but a means of uniting mankind.
电报不仅是一项发明,而且是团结人类的手段。
儿童的一切教育都必须遵循一个原则,即帮助孩子身心自然的发展。
Your brain is more powerful than you think; the key is learning how to activate it.
投资者应对任何声称有必胜方法击败市场的人持怀疑态度。