Have you ever wondered where the rain comes from, or how the clouds are formed? Well, this is what the water cycle (循环) is all about.

When the sun heats up the rivers and oceans, water becomes water vapour (蒸汽) and it rises up in the air. This process is called evaporation. It is the first step of the water cycle. You can also see water vapour at home! Just tell your mommy to heat some water. And as the water gets heated, you’ll be able to see the water vapour rising up in the air.

When the water vapour reaches up in the sky, it turns into tiny droplets (小滴) of water. These water droplets, along with various gases and dust particles (尘粒), come together to form clouds. This is known as condensation. Now, hold a cold lid over the vessel (容器) in which you heated water. When you open the lid after some time, you’ll be able to see water droplets on the lid. That’s exactly what condensation is!

When the cloud becomes too heavy and it cannot hold any more water inside, it bursts open to give out rain, hail or snow. This is known as precipitation.

As it rains, water gets collected in oceans, lakes and rivers. It even seeps (渗透) through the soil and becomes ground water. Thus the water cycle is a continuous process of evaporation, condensation and precipitation.

Become a volunteer and help those who need your help in your community! Volunteer work includes helping the poor, helping the families whose houses were destroyed by natural disasters or creating green spaces for neighborhood families. Whichever service activity you choose, you have the “power of one” to make a difference and create a real change in the community!

Our holiday volunteer jobs are open to all Americans. You don’t need any special skills to join and there are no age limits. With Biosphere Expedition（生物圈探险）, you can be a wildlife and environmental volunteer for anywhere from two weeks to two months. You’ll work with local scientists, and the leaders from Biosphere Expedition will be by your side.

We need students at the age of 16 and up who study at school and want a chance to use their talents, skills and knowledge to help the little kids. They most have enough patience and are warm-hearted. Join the Volunteer Service Center today! Volunteers are the greatest people in the world. Let’s work together to make the world a better place.

Welcome to Qatar (卡塔尔)! I’m your new friend, La’eeb (拉伊卜). As you know, I’m the mascot (吉祥物) of the FIFA World Cup Qatar 2022. My name is an Arabic (阿拉伯) word, it means (意思是) a super-skilled player. Now, let me tell you something about the World Cup.

What is the World Cup? It is an international football competition. And people hold (举办) it every four years. The World Cup is one of the most important events in the world. Every four years, the world’s best players come together to compete. Fans from all over the world come to watch their matches.

The first World Cup was held in 1930 in Uruguay (乌拉圭). In 2010, the host country was South Africa, in 2014 it was Brazil, in 2018 it was Russia, and this year, the host country is Qatar. Qatar is a small but rich country. The whole country is smaller than Beijing. But it has lots of oil (石油) and natural gas (天然气). These make the country rich.

The football game started on November 21st and ended on December 18th. Over 200 countries from all over the world tried to win in the football event. But only 32 teams, including host Qatar, reached the final of the 2022 World Cup.