STEM与日常科技·英语30篇（2）

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鲨鱼皮表面与工程中的减阻设计

Sharks swim fast because their skin has tiny tooth-like structures called denticles.
These denticles break up water flow and reduce drag as the shark moves forward.
Engineers copied this pattern to make swimsuits that help athletes swim faster.
Today, similar textures coat airplane wings and ship hulls to save fuel and energy.
This field of copying nature’s designs for human technology is called biomimicry.
Researchers use microscopes and fluid simulations to test how well new surfaces work.
Unlike smooth coatings, shark-inspired textures control turbulence without adding weight.
Even wind turbine blades now use this principle to improve efficiency quietly.
The idea seems simple, but precise scaling from shark skin to machines is challenging.
Still, it proves that evolution solved engineering problems long before humans invented them.

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

Unlike smooth coatings, shark-inspired textures control turbulence without adding weight. 与光滑涂层不同，仿鲨鱼皮纹理能在不增加重量的情况下控制湍流。
Sharks swim fast because their skin has tiny tooth-like structures called denticles. 鲨鱼游得快，因为其皮肤上有微小的齿状结构，称为盾鳞。
Engineers copied this pattern to make swimsuits that help athletes swim faster. 工程师仿照这种结构，制造出助运动员游得更快的泳衣。

这篇中文题目最接近哪一句？鲨鱼皮表面与工程中的减阻设计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？鲨鱼游得快，因为其皮肤上有微小的齿状结构，称为盾鳞。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） Shark Skin Surfaces and Drag Reduction in Engineering How to cook noodles A maths worksheet

Unlike smooth coatings, shark-inspired textures control turbulence without adding weight.

Unlike smooth coatings, shark-inspired textures control turbulence without adding weight.

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：Unlike smooth coatings, shark-inspired textures control turbulence without adding weight.