STEM与日常科技·英语30篇（9）

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洗衣机如何在洗涤前识别织物类型

Modern washing machines scan fabric weight, thickness, and moisture level as soon as you close the door.
Built-in sensors compare readings to a library of common clothing materials like cotton, wool, or polyester.
If you load mixed items, the machine selects the safest cycle based on the most delicate fabric present.
Some models show a brief icon on the display — like a t-shirt or sweater — to confirm detection.
This prevents shrinking or stretching by avoiding hot water or fast spin speeds when they’re not needed.
No manual input is required; the system works automatically even for first-time users.
Detergent dispensers adjust dosage slightly depending on fabric absorbency and load size.
You’ll hear a soft chime once sensing finishes and the wash cycle begins to run.
Even heavily worn clothes give reliable signals because sensors read physical properties, not labels.
Users appreciate how this feature saves time while keeping favorite shirts looking fresh longer.