中学二年级 · 阅读系列
Lesson 27 · Why the Window Fogged Up
文体：身边的科学 · 朗读音轨 27
先听一遍
听一听，热茶和冰凉的窗玻璃之间发生了什么。
展开英文短文，再悬停查词
After piano practice, I drank hot tea near the window. The room was warm, but the glass was cold. Soon, the window fogged up.
I drew a small star on the glass with my finger.
My father said, "Warm air holds water vapor. When it touches cold glass, some vapor becomes tiny drops of water."
The star disappeared slowly as the drops ran down.
I was not just looking at a foggy window. I was watching water change its form.
逐句跟读
点击任意一句听 Dicvo 的 Jenny 英语语音；开始连续播放前可选择每句播放次数。同一句的每遍之间、切换到下一句之前，都会留出约一遍句子时长供你跟读。原有整篇朗读仍可在上方播放。
请选择一句开始。
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After piano practice, I drank hot tea near the window.
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The room was warm, but the glass was cold.
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Soon, the window fogged up.
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I drew a small star on the glass with my finger.
-
My father said, "Warm air holds water vapor.
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When it touches cold glass, some vapor becomes tiny drops of water."
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The star disappeared slowly as the drops ran down.
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I was not just looking at a foggy window.
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I was watching water change its form.
读懂了什么？
读完后，试着用一句话说出本文的主要意思，并从原文找出支持它的一句话。
查看中文译文
练完钢琴，我在窗边喝热茶。屋里很暖和，玻璃却是凉的。没过多久，窗户就蒙上了雾气。
我用手指在玻璃上画了一颗小星星。
爸爸说：‘暖空气里有水蒸气。水蒸气碰到冰凉的玻璃时，其中一些会变成细小的水滴。’
水滴沿着玻璃流下，星星慢慢消失了。
我看到的不只是起雾的窗户，也是水在改变形态。
本课重点词语
以下是本课重点词语的中文讲解；英文正文中有虚线的单词可悬停查看词义和发音。
- fog up
- 起雾；窗玻璃上出现细小水滴。
- glass
- 玻璃；室内外温差让它较凉。
- draw
- 画；主人公用手指画星星。
- water vapor
- 水蒸气；空气中的气态水。
- touch
- 接触；水蒸气碰到冷玻璃。
- tiny
- 极小的；形容凝结出的水滴。
- drop
- 水滴；不是玻璃自己变出水来。
- run down
- 往下流；水滴沿玻璃流动。
- disappear
- 消失；画出的星星渐渐看不见。
- change its form
- 改变形态；水蒸气凝结为液态小水滴。
背景知识
所谓‘窗户起雾’，是空气中的水蒸气遇到较冷的玻璃后凝结成小水滴。手指画出的痕迹会随着水滴聚集、流动而改变。