短文：科學(xué)理論

科學(xué)理論Scientific Theories In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture...

美文：人生如詩

短文Human Life a Poem I think that, from a biological standpoint, human life almost reads like a poem. It has its own rhythm and beat, its internal cycles of growth and decay. It begins with ...

雙語散文：We Are on a Journey 人生旅途

Wherever you are, and whoever you maybe, there is one thing in which you and I are just alike at this moment, and in all the moments of our existence. We are not at rest; we are on a journey, ...

student