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。
2
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。
3
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).