While the options market is small, it serves as an indicator of longer-term views because its participants tend to look further into the future than those trading in the spot market.

期权市场规模虽小，却可作为反映较长期观点的指标，因为该市场的参与者往往比现货市场投资者看得更长远。

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Research suggests an increase in voice pitch is a good indicator that someone's being deceptive - but it's difficult to spot.

研究表明，音频提高是判断人说谎的好依据——但是这实在太难发现了。

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At present, Indoor Air Pollution has become the social hot spot. Total Volatile Organic Compounds (TVOC) is an important indicator of Indoor Air Quality (IAQ).

当前，室内空气污染已成为社会关注的热点问题，总挥发性有机物(TVOC)是室内空气质量(IAQ)的重要指示指标。

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Ford's outfitted the Fusion Energi with a dizzying array of driver-assist tech, including a lane-keeping system, adaptive cruise control, driver alert system, active park assist, rear camera, blind-spot indicator system with cross-traffic alert and pull-drift compensation (phew).

ENGADGET: Ford Fusion Energi plug-in hybrid test drive (video)

One indicator that could be used to spot problems in schools could be how reliant they are on supply teachers.

BBC: We invited your responses to a feature on supply teachers.