STEM与日常科技·英语30篇（7）

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自动水龙头如何感应你的手

Automatic faucets use infrared sensors to detect hand movement near the spout.
When your hand interrupts the invisible infrared beam, the sensor triggers the water flow.
These sensors work reliably because they respond to heat and motion simultaneously.
The system shuts off water within half a second after hands leave the zone.
This design saves water by preventing accidental or prolonged running.
Unlike mechanical taps, infrared faucets require no physical contact to operate.
They rely on simple electronics that convert light signals into electrical commands.
Many public restrooms use this technology to improve hygiene and conserve resources.
Battery-powered models last over two years before needing replacement.
Engineers optimize the detection range so it works for children and adults alike.

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

Battery-powered models last over two years before needing replacement. 电池供电型号续航超过两年才需更换电池。
This design saves water by preventing accidental or prolonged running. 该设计通过防止误开或长时间流水来节约用水。
Unlike mechanical taps, infrared faucets require no physical contact to operate. 与机械式水龙头不同，红外水龙头无需触碰即可操作。

这篇中文题目最接近哪一句？自动水龙头如何感应你的手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？自动水龙头利用红外传感器探测手部靠近出水口的动作。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 Automatic Faucets Detect Your Hands How to cook noodles A maths worksheet

Battery-powered models last over two years before needing replacement.

Battery-powered models last over two years before needing replacement.

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：Battery-powered models last over two years before needing replacement.