1925 年，美国科学家麦凯做了一个实验。他把一群幼鼠分为两组喂养。第一组每天提供充足的食物，让它们终日饱食。第二组每天只给 60% 的食物，让它们饿着肚子...

At present, more and more people are concerned about fake commodities, for they cause very serious social problems. Many things can be fake, such ...

Nowadays, more and more people realize the harm of smoking and the damage it bring to the people around us. Considered the health of people themse...

Many people believe that having a lot of money is the greatest happiness in life. But I don’t agree with them, because money is not everythi...

I’m neither interested in sports nor good at it. But except swimming. I can swim since I was a baby. My mother tells me that she let me swim in th...

In our modern society, competition has been increasingly intense, especially in large cities. Therefore, people are forced to work much harder tha...

Nowadays, with the fast development of the market economy, the wider variety of commodities has been offered to people. However, the proliferation...

In recent years, losing weight has become a hot topic in our life, especially in women’s community. However, losing weight has aroused people’s at...

Among the problems we face, I think poverty is the biggest problem. My reasons are as follows. 在我们所面临的问题当中，我认为贫困是最大的问题。...

Many of my friends do not like eating vegetables, because they think that vegetables are not delicious. They like KFC or Mcdonald’s. Being d...