十万个为什么·科学阅读30篇（2）

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萤火虫如何发出不发热的冷光，又不会烧伤自己？

Fireflies make light through bioluminescence — a chemical reaction inside living organisms.
They combine luciferin, oxygen, and ATP with the enzyme luciferase to produce visible light.
Over 90% of the energy becomes light, not heat, which is why it’s called ‘cold light’.
This efficiency far exceeds incandescent bulbs, which waste most energy as infrared radiation.
Each species flashes a unique pattern to attract mates or warn predators about bad taste.
The light intensity and timing are controlled by nerve signals regulating oxygen flow to light organs.
Scientists have copied this system to develop biosensors that detect disease markers in human cells.
Unlike fire or electricity, bioluminescence requires no high temperature or external power source.
Marine creatures like jellyfish and anglerfish also use similar chemistry in deep-ocean darkness.
This natural design inspires sustainable lighting and medical imaging technologies worldwide.

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

This natural design inspires sustainable lighting and medical imaging technologies worldwide. 这一自然设计正推动全球可持续照明与医学成像技术的发展。
Fireflies make light through bioluminescence — a chemical reaction inside living organisms. 萤火虫通过生物发光——即活体生物体内的化学反应——产生光。
This efficiency far exceeds incandescent bulbs, which waste most energy as infrared radiation. 这种效率远超白炽灯，后者大部分能量以红外辐射形式浪费。

这篇中文题目最接近哪一句？萤火虫如何发出不发热的冷光，又不会烧伤自己？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？萤火虫通过生物发光——即活体生物体内的化学反应——产生光。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） How Do Fireflies Produce Cold Light Without Burning? How to cook noodles A maths worksheet

This natural design inspires sustainable lighting and medical imaging technologies worldwide.

This natural design inspires sustainable lighting and medical imaging technologies worldwide.

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：This natural design inspires sustainable lighting and medical imaging technologies worldwide.