科学素养与生活应用·英语30篇（3）
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How Automatic Doors Sense People
自动门如何感知人的靠近
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Automatic doors use infrared sensors to detect body heat.自动门利用红外传感器探测人体热量。
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These sensors send invisible light waves toward people nearby.这些传感器向附近人员发射不可见的光波。
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When waves bounce back, the door knows someone is there.当光波反射回来时，门便知道有人靠近。
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Then a small motor opens the door smoothly and safely.随后，小型电机平稳安全地开启门。
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No buttons or touching are needed for entry or exit.进出无需按按钮或触碰门。
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This tech helps save energy and improves accessibility for all.该技术有助于节能并提升所有人的通行便利性。
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It works well in malls, hospitals, and airports every day.它每天在商场、医院和机场等场所稳定运行。
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The system resets quickly after each person passes through.每个人通过后，系统会迅速重置。