The third officer should often check the number of life-saving signals, validity and status.

三副应当经常检查救生信号的数量，有效期和状况。

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One crux of energy saving irrigation techniques is to investigate appropriate thirst signals of water saving irrigation control.

节水、节能灌溉技术的关键之一在于寻求合理的节水灌溉控制信号。

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The kernel of this system is computer. The system has the ability for well logging signals sampling, saving, displaying, expl…

以计算机为主控核心单元，主要实现数据的采集、保存、显示、解释和打印输出等功能。

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The four-week project will replace existing lights with new energy saving LED signals on the A590 between Ulverston and Lindal-in-Furness.

BBC: Cumbria traffic light improvements begin