chāo jí dà guó

超级大国

de

的

tiǎo zhàn

挑战

hé

和

shì jiè

世界

xīn

新

biàn huà

变化

In the past, the United States was the most powerful country in the world.

After the collapse of the Soviet Union, the United States became even stronger.

However, historian Kennedy said long ago that America's strength might face problems.

He believed China would become stronger, and the United States would have new rivals.

Now, China is developing rapidly, and America's influence has decreased.

The relationship between the United States and other countries has worsened; some countries no longer listen to the United States.

Now, the world is becoming multipolar, no longer dominated by a single superpower.

Technology is also changing warfare, such as drones, cyber attacks, and artificial intelligence.

Small countries can also use new technology to protect themselves.

Although technology has advanced, some people have become poorer, and social problems have increased.

The future world order will change, and we need to pay attention to the impact of these changes.