如果没有地幔对流的概念,大陆漂移理论将只是一种猜测。
The more people you love, the weaker you are.
In the examination of the parts of animals, I have diligently endeavored to arrive at the truth.
"Every novel is a mirror held up to society's face - sometimes it reflects beauty, more often it shows the cracks we try to ignore."
你们必须掌握许多知识,让它们在你们的头脑里形成一个思维框架,在随后的日子里能自动地运用它们。
心灵的能量是生命的本质。