When it comes to what makes up a good student, many people may have the stereotypes that a good student is one who can always get high marks in examinations.
Cold weather comes all of a sudden; I never realize that before I saw a bird knocking at the kitchen’s window for food. One night, my father told me there is a small bird standing on the wire ou
It is well-known that water is indispensable in existing, in producing and in living. And we should not waste of a drop of water.
众所周知，在生产和生活中水是必不可少的。我们不应该浪费一滴水。
Everything in the world is in constant struggle, 'struggle' in the sense of competition in natural selection among organisms. Animals and plants struggle for their existence. Nature provides them with
The history of life on earth has been a history of interaction between living things and their surroundings. To a large extent, the physical form and the habits of the earth's vegetation and its anima
