朗读者：Zimo 朗读文本： Space is incredibly vast with countless mysteries. A trip to space sounds like an amazing adventure, but it can affect astronauts' health. Space is filled with various threats to humans. So astronauts' life in space can be both appealing and dangerous. In space, the lack of gravity can make astronauts lose muscle and bone, which potentially makes them weaker. To cope with this problem, astronauts follow a strict exercise routine in space to maintain muscle and bone strength, besides working. Space is filled with radiation from the sun and other sources. Astronauts' exposure to the radiation can increase their risk of cancer and other health issues. Apart from that, some astronauts experience vision problems due to changes in the fluids around their eyes. They are challenges astronauts face during their space missions.
朗读者：Yuan 朗读文本： Overweight happens when a person has too much body fat. It is a health problem affecting people allover the world. In fact, more than one billion people worldwide are suffering from overweight. Here are two main reasons why overweight occurs. Firstly, eating too much unhealthy food high in sugar and fat can lead to weight gain. Lack of physical activity is another factor. When we don't move our body enough, excess fat can accumulate. Overweight can harm us in many ways. First, it raises the risk of severe health problems, like high blood pressure, heart disease, and even some types of cancer. It can also affect our self-confidence and mental health. Lastly, it forces our bodies to work extra hard to carry the extra weight, making everyday activities harder.
朗读者：Ruoyi 朗读文本： Tsunamis are giant, powerful ocean waves that usually happen after an earthquake or volcanic eruption. Tsunamis vary in frequency and can happen at any time of the year. On average, there are about ten major tsunamis recorded globally each century, but these events can occur more frequently in some regions, especially those with a history of undersea volcanic eruptions. To stay safe from tsunamis, follow these tips: Pay attention to tsunami warnings from local authorities. These warnings can come through TV, radio or phone alerts. If you hear a warning, take it seriously. Head to higher ground or move away from the coast as quickly as possible. Tsunamis can flood coastal areas, so being far away from the sea is the safest option. After a tsunami warning, stay updated with information. It's important to follow the latest safety order from authorities.
朗读者：Alison 朗读文本： Have you ever found that we are surrounded by information and ideas that agree with what you know and like? It's like staying in a "knowledge bubble". And you might miss out on different perspectives or new facts. Many online platforms that provide personalized content have contributed to the forming of the bubble, such as short video apps. How can we break this bubble? First of all, read from different places or websites to get diverse points of view. Don't just stick to one type of news or information resource. Second, we need to thinkcarefully when we see something online. Check if it's true or not by searchingfor information from different resources. Third, talk to people who hold different views from you. It helps you understand their ideas better and find things you both agree on.
朗读者：Carrie 朗读文本： Hiking is a fantastic outdoor activity that's perfect in spring and fall when the weather is mild. Anyone, young or old, can enjoy it. Hiking has a rich cultural background that extends back through centuries and varies across different regions of the world. It is closely related to the way people interact with and appreciate the natural world. Hiking is like a fun workout in nature. You might discover hidden treasures like waterfalls and wildlife along the way. Hiking allows you to leave your worries behind and be at one with nature. It's a break from screens and a chance to breathe fresh air. Moreover, hiking is a great way to spend quality time with friends and family. You can chat, share stories and make amazing memories while enjoying the beauty of nature together.
朗读者：Jingjie 朗读文本： Microplastics are tiny pieces of plastic smaller than a grain of rice. We can find microplastics everywhere, like in the ocean, rivers and even in the air we breathe in. They come from broken-down plastic products and tiny bits in things like body wash and toothpaste. Microplastics can even take hundreds of years to break down. As a result, they pose a significant threat to our natural ecosystems. Meanwhile, microplastics are dangerous because they can absorb harmful chemicals from their surroundings. Wildlife can eat them by accident, and it can hurt or even kill them. Microplastics can also get into our food, which could potentially cause health problems. Researchers are still studying the long-term effects of being exposed to microplastics, but it's clear they could be really harmful to the environment and our health.
朗读者：Andy 朗读文本： Eskimos are native people in the Arctic regions of North America and Greenland. They've adapted to the cold climate by building igloos. The igloo is a house made of ice and snow blocks. It helps Eskimos stay warm in the severe cold. Igloos are like cozy ice caves with a round shape and a small tunnel to get inside. Igloos are surprisingly warm inside even when it's freezing cold outside, because the snow traps the heat inside. Even though they're made of snow, igloos can handle heavy snow and strong winds because of their shape. Besides, they are easy to build since snow is everywhere. People can make them quickly with simple snow tools, and they're useful for shelter when hunting or during emergencies.
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