104 Gases in Your World-Low

Gases in Your World FOCUS Question How do people use gases in their daily lives?

你生活中的气体焦点问题人们在日常生活中如何使用气体?

Groups of Gases You may not know it, but gases are very important in your life. You use them in your home. Factories use them to make things you need. You breathe in gases to stay alive! There are many different kinds of gases. Some gases are stable. That means they don't change when mixed with other gases. Some gases are less stable. These gases may combine with other gases to form new mixtures. Some gases give off light. Some burn well. The properties of a gas help people decide how to use it.

你可能不知道，但气体在你的生活中非常重要。 你在家里使用它们。 工厂用它们来制造你需要的东西。 你吸入气体来维持生命!有许多不同种类的气体。 有些气体是稳定的。这意味着它们与其他气体混合时不会发生变化。 有些气体不太稳定。 这些气体可能与其他气体结合形成新的混合物。 有些气体发光。 有些很容易燃烧。气体的性质有助于人们决定如何使用它。

Noble Gases Neon is a kind of gas. It belongs to a group called the noble gases. These gases are very stable. Neon gives off the bright, colorful light you see in some signs. Neon is also used to help create the light in many lasers. Argon is also a noble gas. People use it between double-paned windows. It blocks noise and keeps frost from forming on the glass. Welders use argon, too. When it gets very hot, it connects pieces of metal.

惰性气体氖是一种气体。 它属于惰性气体。 这些气体非常稳定。 霓虹灯发出明亮多彩的光，你可以在一些标志上看到。 霓虹灯也被用来帮助在许多激光中产生光。 氩也是惰性气体。 人们把它用在双层玻璃窗之间。 它能阻隔噪音，防止玻璃上结霜。 焊工也使用氩气。当它变得非常热时，它会连接金属碎片。

Breathe It In Oxygen is not a noble gas. It can easily mix with other substances. We need oxygen to live. It makes up about twenty-one percent of the air we breathe. People use oxygen for many things Scuba divers use tanks filled with air, which includes oxygen and other gases. On very high mountains, the air has less oxygen, so some climbers bring oxygen tanks. This gas also helps people who can't breathe well. They can use tanks to get the oxygen they need.

吸入氧气不是惰性气体。 它很容易与其他物质混合。 我们需要氧气来生存。它约占我们呼吸空气的21%。 人们使用氧气做很多事情，戴水肺的潜水员使用充满空气的气罐，其中包括氧气和其他气体。 在很高的山上，空气中的氧气较少，所以一些登山者带上氧气罐。 这种气体还能帮助呼吸困难的人。 他们可以用氧气瓶获取所需的氧气。

Breathe It Out Oxygen combines with carbon to make a new kind of gas. This gas is called carbon dioxide When we breathe out we give off carbon dioxide. Most animals give off this gas when they breathe out. Plants need this gas to produce the sugars they use for energy. So plants take in carbon dioxide. People use carbon dioxide in fire extinguishers. This gas is good for putting out fires. Fire needs oxygen to burn. Carbon dioxide keeps a fire from getting oxygen. Carbon dioxide is also in soda. It causes these liquids to have bubbles.

呼出氧气和碳结合形成一种新的气体。 这种气体叫做二氧化碳，当我们呼气时，我们释放出二氧化碳。 大多数动物在呼气时会释放出这种气体。 植物需要这种气体来产生用于能量的糖。 所以植物会吸收二氧化碳。 人们在灭火器中使用二氧化碳。 这种气体对灭火有好处。 火需要氧气才能燃烧。 二氧化碳使火无法获得氧气。 碳酸饮料中也含有二氧化碳。 它使这些液体产生气泡。

Necessary Nitrogen Nitrogen is another kind of gas. It makes up 78 percent of the air we breathe. This gas is useful to people in many ways. In its liquid form, it is very cold. We use liquid nitrogen to keep food cold. It is also used in some computers to keep the parts from getting too hot. Nitrogen helps X-ray machines stay cool. Then doctors get clearer pictures. Oil factories prepare the gasoline we use. They use nitrogen to keep oxygen out of pipes. Oxygen can explode, but nitrogen is stable. Using nitrogen makes it safer to move the gasoline.

氮是另一种气体。 它占我们呼吸空气的78%。 这种气体在许多方面对人们有用。 在液态时，它是很冷的。 我们用液氮来冷藏食物。 它也被用于一些计算机，以防止零件变得太热。 氮有助于x光机保持凉爽。 然后医生就能得到更清晰的照片。 炼油厂生产我们使用的汽油。 他们用氮气防止氧气进入管道。 氧气会爆炸，但氮气是稳定的。 使用氮气可以更安全地运输汽油。