十万个为什么·科学阅读30篇（1）

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为什么泡泡一碰就破？

Soap bubbles look magical, but they’re actually very fragile films of water sandwiched between two layers of soap molecules.
The outer and inner surfaces pull inward due to surface tension, which keeps the bubble round and thin.
When a finger or dust touches it, that local area loses balance and the water layer drains instantly.
Evaporation also thins the film from within, especially in dry or warm air, making rupture more likely.
Adding glycerin or sugar to homemade bubble solution slows evaporation and increases flexibility.
Light bends differently through the changing thickness of the film, creating those shimmering rainbow colors.
Even gentle air currents disturb the delicate force equilibrium, causing early collapse before full formation.
Scientists study bubble physics to improve medical ultrasound contrast agents and food texture engineering.

听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。

Adding glycerin or sugar to homemade bubble solution slows evaporation and increases flexibility. 自制泡泡液中添加甘油或糖可减缓蒸发、增强韧性。
Scientists study bubble physics to improve medical ultrasound contrast agents and food texture engineering. 科学家研究泡泡物理，以改进医用超声造影剂和食品质构工程。
Light bends differently through the changing thickness of the film, creating those shimmering rainbow colors. 光线穿过厚度不断变化的液膜时发生不同程度的折射，形成 shimmering 彩虹色。

这篇中文题目最接近哪一句？为什么泡泡一碰就破？一次学校运动会的通知一份超市购物清单

课文第一句的意思更接近？肥皂泡看似神奇，实则是夹在两层肥皂分子之间的极薄水膜。今天学校放假了。请把窗户打开。

这一课主要在讲什么？（看英文标题） Why Do Bubbles Pop So Easily? How to cook noodles A maths worksheet

Adding glycerin or sugar to homemade bubble solution slows evaporation and increases flexibility.

Adding glycerin or sugar to homemade bubble solution slows evaporation and increases flexibility.

第一版：录下来、回听、再听标准音。系统打分以后再加。

用今天的表达，自己说一句。

例子：Adding glycerin or sugar to homemade bubble solution slows evaporation and increases flexibility.