It USES a thin stream of falling sand to measure time.

它使用一小股落下的沙子来计算时间。

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Biochemical oxygen demand — the measure of the oxygen demand placed on a stream by any particular volume of effluent.

生化耗氧量——在由特定容量排放的小河中氧需求的测量。

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Introduced a ratio method to measure the heat stream temperature with platinum resistor, the interface circuit is simplified and the precision for the flow measurement improved largely.

引入了一种基于比率法的铂电阻高精度测温方法，简化了接口电路，从而提高了热蒸汽密度和流量计量精度。

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In addition, the device has the ability to measure, record and stream back in real-time data to flight controllers on Earth, giving doctors better insight into the crew's exercise.

ENGADGET: NASA and IHMC building X1 exoskeleton to give us a lift, keep us fit in space and on Earth