Some sensors provide only a single data value, while others provide three float values.

有些传感器只提供一个数据值，另一些则提供三个浮点值。

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These nano-sized sensors would float around the bloodstream until they ran into some toxic chemical or disease-causing germ.

这些纳米级的传感器将沿着血流漂流，直到它们遇到有毒化学物质或致病菌。

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Equipped with sophisticated cameras, infrared sensors and other detection equipment, the small blimps often float 2, 000 feet over an area to keep a round-the-clock watch.

WSJ: Battlefield Blimps to Patrol U.S.-Mexico Borders