Reactivity is an increase in negative emotions or a decrease in positive emotions.

情绪反应是指消极情绪的增加或积极情绪的减少。

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MONEY: Staying positive in negative territory.

金钱：在不富足的地方保持积极的心态。

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Around a quarter of borrowers are now in negative equity.

大约四分之一的借款人目前属于资不抵债的状态。

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Surprisingly, people in their seventies and eighties were least likely to report feeling negative or harmful emotions.

VOA: special.2010.08.03

The difference is in positive reinforcement you do something; in negative reinforcement you take away something aversive.

区别就是，在正强化中你接受某种刺激;,而在负强化中你回避了某种厌恶刺激。

耶鲁公开课 - 心理学导论课程节选

The weather. I mean, right now, it's negative five degrees and there's a blizzard in Boston and

主要是天气。现在这里是零下5度，但在波士顿就已经暴雪不断了，

旧金山的天气 - SpeakingMax英语口语达人

However, the housing crash has meant a huge percentage of people are now in negative equity.

BBC: Interest-only mortgage shortfall 'big problem' for NI

Stocks opened well in negative territory but bounced higher as the Fed Chairman took the podium.

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This has resulted in negative publicity for CSD companies and less consumption of soft drinks.

FORBES: Coke Has Limited Fizz To $60 With Slipping Soda Sales