be on the decrease

基本解释

In winter, the refrigerating device can be powered on to decrease the water temperature.
在夏季还可开启制冷装置降低水温。
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Did you ever think how nice it would be to increase or decrease the font size on your mobile phone?
你曾经想过如果能增大或减小你手机的字体有多好吗？
This membrane can be used to fabricate a phenol optical sensor based on the decrease of chemiluminescence intensity.
此敏感膜可用于制备基于化学发光强度减弱的苯酚光化学传感器；

In any case the decision to decrease expenditures on defense and law enforcement can only be taken by the president said a highly placed government official.
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President GEORGE W. BUSH: As we make progress on the ground and Iraqi forces increasingly take the lead, we should be able to further decrease our troop levels.
NPR: Bush Faces Tougher Audience in This Year's Address
The year-on-year growth rate will be 43% in 2011, but will decrease to 13% over the next five years.
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