Rubber & Glass

橡胶和玻璃 · P3 Science · Pages 49–50
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Section 1 · Key Vocabulary
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Section 2 · Text Reading
课文朗读 · 点播放键听整段
🟢 Paragraph 1 · Rubber 橡胶
Rubber can come from the sap of a rubber tree. It can also be man-made by using oil from the ground. Rubber can be used to make many objects. Rubber gloves, rubber bands, bouncing balls, bicycle tyres, rain boots and raincoats are all made from rubber.
橡胶可以来自橡胶树树液,也可以用从地下开采的石油人工制造。橡胶可以用来制作很多东西。橡胶手套、橡皮筋、弹力球、自行车轮胎、雨靴和雨衣都是用橡胶做的。
💡 你的橡皮擦其实也跟橡胶有关系哦!"rubber"这个英文单词既可以指橡胶,也可以指橡皮擦。
🟢 Paragraph 2 · I'm Inspired 科学家的故事
Rubber was once thought to be a useless material. Natural rubber is sticky when the weather is hot and breaks easily when the weather is cold. Charles Goodyear, a scientist, dedicated his life to finding a solution to the problem. After working hard for more than five years, he finally succeeded in finding a solution to allow rubber to be used in different kinds of weather.
橡胶曾经被认为是一种没用的材料。天然橡胶在天热时会变,天冷时容易断裂。科学家查尔斯·固特异一生致力于解决这个问题。经过五年多的努力,他终于成功找到了让橡胶在各种天气下都能使用的方法。
💡 固特异轮胎的名字就来自这位了不起的科学家!坚持不放弃,最终解决了大难题。
🟢 Paragraph 3 · Glass 玻璃
Glass is made from sand. When sand is heated until it is very hot, it melts and becomes clear. The hot melted sand is then poured into moulds to make it into different shapes. When the melted sand cools down, it changes into clear glass. Since we can see through glass, it is used to make glass tanks, window panes, light bulbs and spectacles.
玻璃是用沙子做的。当沙子被加热到非常高的温度时,它会融化并变得透明。然后把滚烫的融化沙子倒入模具中,做成各种不同的形状。当融化的沙子冷却后,就变成了透明的玻璃。因为我们可以透过玻璃看东西,所以玻璃被用来制作鱼缸窗户玻璃灯泡眼镜
💡 想象一下,你窗户上的玻璃其实是沙子变来的!沙滩上的沙子加热到极高温度就能变成透明的玻璃。
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Section 3 · How Glass is Made
玻璃是怎么做出来的 · 点每个步骤听讲解
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Section 4 · Quick Quiz
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🌟 The Big Idea · 一句话总结
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