十万个为什么·科学阅读30篇（9）

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萤火虫如何精确控制闪光节奏？

Fireflies produce light through bioluminescence — a chemical reaction inside living tissue that releases energy as visible light.
The key chemicals are luciferin, oxygen, and the enzyme luciferase, which together create cold, efficient light without heat.
Each species has its own genetically programmed flash pattern, including duration, interval, and number of pulses.
Neural signals trigger bursts of oxygen delivery to light-producing cells, allowing precise timing down to milliseconds.
Males flash while flying to attract females, who respond with species-specific delays — like a coded conversation in darkness.
Some predatory fireflies even mimic these patterns to lure and eat other species, showing how vital timing is for survival.
Temperature also affects flash rate: cooler nights slow metabolism, making flashes slower and longer.
Scientists study these rhythms to understand circadian control in insects and develop new bioimaging tools.

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

Temperature also affects flash rate: cooler nights slow metabolism, making flashes slower and longer. 温度也影响闪光频率：凉爽夜晚会降低新陈代谢，使闪光变慢、变长。
Scientists study these rhythms to understand circadian control in insects and develop new bioimaging tools. 科学家研究这些节律，以理解昆虫的昼夜调控机制，并开发新型生物成像工具。
Each species has its own genetically programmed flash pattern, including duration, interval, and number of pulses. 每种萤火虫都有由基因决定的独特闪光模式，包括闪光时长、间隔和脉冲次数。

这篇中文题目最接近哪一句？萤火虫如何精确控制闪光节奏？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产生光——即活体组织内释放可见光的化学反应。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 Fireflies Control Their Flash Timing How to cook noodles A maths worksheet

Temperature also affects flash rate: cooler nights slow metabolism, making flashes slower and longer.

Temperature also affects flash rate: cooler nights slow metabolism, making flashes slower and longer.

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：Temperature also affects flash rate: cooler nights slow metabolism, making flashes slower and longer.