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变色龙如何改变体色？

Chameleons don’t change color to match backgrounds exactly—they shift hues mainly to communicate or regulate body temperature.
Special skin cells called chromatophores contain pigments like yellow, red, and brown, which expand or contract under nervous control.
Beneath them, iridophores reflect light using tiny guanine crystals that rearrange to alter wavelength interference.
Cooler temperatures cause crystal lattices to tighten, reflecting shorter blue wavelengths; warmth spreads them to reflect longer red ones.
Males often brighten during mating season, while stress or illness may trigger dull, dark tones.
Recent studies show some chameleons even adjust brightness independently of hue for better camouflage in shade or sun.
Robotic engineers copy this layered optical system to develop adaptive camouflage materials for sensors.
Unlike octopuses, chameleons rely less on vision feedback and more on internal hormonal and thermal signals.

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

Robotic engineers copy this layered optical system to develop adaptive camouflage materials for sensors. 机器人工程师借鉴这种分层光学系统，开发用于传感器的自适应伪装材料。
Beneath them, iridophores reflect light using tiny guanine crystals that rearrange to alter wavelength interference. 其下方的虹彩细胞利用微小的鸟嘌呤晶体反射光线，晶体排列变化可改变光波干涉效果。
Males often brighten during mating season, while stress or illness may trigger dull, dark tones. 雄性在繁殖期常变得鲜艳，而压力或疾病则可能导致体色暗淡发黑。

这篇中文题目最接近哪一句？变色龙如何改变体色？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？变色龙并非为了精确匹配背景而变色，主要通过改变体色来交流或调节体温。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 Chameleons Change Color? How to cook noodles A maths worksheet

Robotic engineers copy this layered optical system to develop adaptive camouflage materials for sensors.

Robotic engineers copy this layered optical system to develop adaptive camouflage materials for sensors.

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：Robotic engineers copy this layered optical system to develop adaptive camouflage materials for sensors.