一个奇怪的事实是,在大西洋两岸发现了极其相似的动植物,但没有人对这一现象给出令人满意的解释。
The metropolis exacts from man as a discriminating creature a different amount of consciousness than does rural life.
感激是狗才会患的病。
Science is a powerful tool for humanity to understand and transform the world.