Level 2 · Reading series
Lesson 27 · Why the Window Fogged Up
Audio track 27
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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.
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Chinese translation
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。
Key words and expressions
Key terms have Chinese explanations. Hover over dotted words in the English passage for word help and pronunciation when available.
- 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。
Background notes (Chinese)
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。