Ear thermometers use an infrared beam to detect temperature, rather than mercury.

耳朵温度计采用红外光束, 而不是水银来测量体温.

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Vulnerable to dust infrared beam.

红外射束易受尘埃.

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The design of intelligent infrared beam smoke detector based on PIC MCU id presented.

给出一种PIC单片机为核心的智能红外光束感烟探测器的设计.

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