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萤火虫如何发出不发热的冷光而不燃烧？

Fireflies produce light through a chemical reaction called bioluminescence, not combustion.
A molecule named luciferin reacts with oxygen, aided by the enzyme luciferase inside their bodies.
This reaction releases almost all energy as visible light—less than 0.01% becomes heat.
Because no flame or high temperature is involved, it’s known as ‘cold light’.
The color of light varies slightly among species due to subtle differences in luciferin structure.
Fireflies control blinking by regulating oxygen flow to light-producing cells in their abdomen.
Their flashing patterns serve as mating signals, with each species having a unique rhythm.
Researchers use firefly enzymes in labs to detect ATP, a key energy molecule in living cells.
Unlike LEDs or bulbs, bioluminescence needs no external power—only biological fuel.
This natural system inspires eco-friendly lighting designs and medical imaging tools.

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

Fireflies produce light through a chemical reaction called bioluminescence, not combustion. 萤火虫通过一种名为生物发光的化学反应发光，而非燃烧。
Unlike LEDs or bulbs, bioluminescence needs no external power—only biological fuel. 与LED或灯泡不同，生物发光无需外部电源，仅需生物燃料。
This natural system inspires eco-friendly lighting designs and medical imaging tools. 这一自然系统为环保照明设计和医学成像工具提供了灵感。

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而不燃烧？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？萤火虫通过一种名为生物发光的化学反应发光，而非燃烧。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

Fireflies produce light through a chemical reaction called bioluminescence, not combustion.

Fireflies produce light through a chemical reaction called bioluminescence, not combustion.

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：Fireflies produce light through a chemical reaction called bioluminescence, not combustion.