It is quite possible that these fluctuations, the huge increase and decrease of sulfur dioxide, happening again and again.

很有可能这些波动，二氧化硫的大量增加和减少，一次又一次地发生。

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Increase and decrease the number of used threads depending on load.

根据负载增加和减少使用线程的数量。

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These exercises let your heart rate increase and decrease gradually.

这些活动能让你的心率逐渐增加和降低。

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In China,some farmers and researchers blame a decrease in pesticide use for an increase in pests unaffected by Bt.

VOA: special.2009.10.27

"Then we tell them to follow some new rules for living that will decrease their chances of ending up dead or in prison and increase their chances dramatically of staying alive and free."

VOA: special.2010.08.26

Next, we examined increase and decrease in price per square footage to determine where market value is the highest.

FORBES: Magazine Article

Both testosterone doses used in the study seemed to increase desire and decrease distress.

CNN: Testosterone patch may kick-start sex drive in women

Overall then there is good evidence that several simple exercises increase happiness and decrease depression.

BBC: NEWS | Programmes | Happiness Formula | Staying happier for longer