Ceramic honeycombs were used for 30 times with no significant change of activity.

蜂窝陶瓷连续使用30次，其催化活性基本没有变化。

youdao

Real life is not a change of activity, but a change of the quality of the activity.

真正的生活不是行为的改变，而是行为的质变。

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For the whole process of annealing, the leading factor for the change of activity of the al alloy anode was the change of crystal defects.

整个退火过程中，晶体缺陷的变化对铝阳极活性改变影响最大。

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Scientists say climate change and human activity have increasingly led to the melting of massive pieces of Antarctic ice.

VOA: special.2009.04.22

"Kids really get engaged in science in the garden where it's a kind of fun activity where they're collecting data and seeing how different temperatures will change the amount of water that's needed by a crop, so the science concepts come easily."

VOA: special.2011.06.14

Before the program stops making use of the processor, it registers its change of activity with Windows Push Notification Services (WNS) - software that runs on Microsoft's remote computer servers.

BBC: Skype slashes battery use for Windows 8 system launch

The third major change is the concentration of activity in Washington, D.

NPR: Intelligence Failures In 'Top Secret America'

We see a flurry of misdirected activity in the face of rapid change so many meetings and people talking about what needs to change but no one is doing anything that is essentially different from what they were doing in the past.

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