Spectrum 光谱 Do you know what a spectrum is? 你知道光谱是什么吗? It is a series of colored lights. 它是复色光。 How can we see a spectrum? 我们怎么能看到光谱? When you see sunlight through a prism, you may see a rainbow

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Penguin 企鹅 Do you know where we can find penguins? 你知道我们在哪里能找到企鹅吗? Some penguins live near the South Pole. 有些企鹅生活在南极附近。 But others live in mild weather too. 但也有其他企鹅生活在温和的

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Siblings 同胞 Siblings are brothers and sisters. 同胞是指兄弟姐妹。 Siblings have the same parents. 同胞有相同的父母。 They usually grow up together in the same family. 他们通常在同一个家庭共同长大。 Also they spend

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Symbols 标记 Symbols express some ideas with designs. 标记能表达设计的一些想法。 Where can you find symbols easily? 你在哪儿能轻易地找到标记? You can find them on maps. 你可以在地图找到它们。 Also you can find

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Cooperation 合作 Why do people cooperate with other people? 人们为什么要与他人合作? They cooperate with others to make things easier and faster. 人们合作是为了使事情变得简单快速。 Children usually cooperate with their

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Predators 捕食者 Predators kill other animals for food. 捕食者杀死其他动物来获取食物。 Snakes are one of the predators in jungles. 蛇类是丛林中的捕食者之一。 They are predators to rats and other small animals. 它们捕食

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Sports Etiquette 体育礼仪 Do you know what sports etiquette is? 你知道体育礼仪是什么吗? Sports players should have manners when they play sports with others. 运动员在进行体育比赛的时候应该要有礼貌。 Should only sp

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Basketball 篮球 Do you like basketball? 你喜欢篮球吗? Basketball is a very popular sport. 篮球是一项广受欢迎的体育运动。 A basketball game needs two teams. 篮球比赛需要两队。 Each team has 5 players. 每队有五名球

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Diameter 直径 A diameter is a straight line inside a circle. 直径是圆内的直线。 Can any straight line in a circle be a diameter? 圆内的任何直线都是直径吗? No, its two ends must meet at two different points on the circle. 不是

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Dam 水坝 If you want to use water for electric power and to prevent flooding or drought, what should you do? 如果你想用水发电,防洪或防旱,你该怎么做? You have to make a dam. 你得建座水坝。 A dam is very useful for many

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Seascape 海景画 Painters love to draw people, animals, trees and rivers. 画家爱画人物、动物,树木和河流。 Also, one of the most popular subjects is the seascape. 海景也是最受欢迎的主题之一。 Seascapes include scenes o

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African Americans 非裔美国人 Who are African Americans? 谁是非裔美国人? African Americans are Americans from the African continent. 非裔美国人是来自非洲大陆的美国人。 Why did African Americans leave their countries and

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Supreme Court 最高法院 Do you know what the supreme court is? 你知道什么是最高法院吗? The supreme court is the highest court in the United States. 最高法院是美国最高等的法院。 What does it do? 它的作用是什么? T

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Sandstorms 沙尘暴 If the storm comes to a desert, what will happen? 如果沙漠刮起风暴会怎样? Sand and dust will blow with the wind. 沙尘都会被风吹起来。 This is called a sandstorm. 这就是所谓的沙尘暴。 The Sahara De

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Celsius 摄氏度 How cold is it outside? 外边多冷? There are two different temperature scales. 有两种不同的温标可以衡量。 There are celsius and fahrenheit. 它们是摄氏度和华氏度。 Who invented celsius? 谁发明的摄氏度

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Bugs 虫子 What are bugs? Bugs usually have thick skin. 什么是虫子?它们通常有厚厚的外壳。 There are many kinds of bugs. 虫子有很多种。 Some bugs have body parts. 有些虫子有身体部位。 For example, antibodies have th

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Waves 波浪 A wave is the movement of water. 波浪是水的运动。 Why do waves happen? 波浪是怎么产生的呢? Waves are made when the wind blows over the surface of water. 风吹水面就会产生波浪。 On the beach, you probably watc

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The Ozone Layer 臭氧层 Can humans live away from the Earth? 人类能远离地球生活吗? Maybe it will be possible in the future but it is impossible now. 或许将来可以,但现在不行。 In our solar system, the Earth is probably the

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Thomas Edison 托马斯-爱迪生 Thomas Edison was a great inventor in history. 托马斯-爱迪生是历史上伟大的发明家。 One of his famous inventions was the electronic light bulb. 他著名的发明之一是电灯泡。 Thanks to his in

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Culture 文化 Culture is a certain group's unique way of thinking and behaving. 文化是指某一群体特有的思考和行为的方式。 Therefore, there are a lot of different cultures in the world. 因此,世界上的文化多种多样。 Gr

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