The difference in activity between 2-oh and 3-oh for the tosylation reaction has been explored.

在制备过程中，对2 OH和3 OH的对甲苯磺酰化反应活性差异进行了初步探讨。

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The experiment found that though there was no difference in performance - the tasks were very easy - the level of activity in the subjects' brains differed, suggesting different levels of effort.

这项实验发现，尽管表现没有区别——任务相当简单——被研究对象脑部的活动级别不同，显示了努力程度不同。

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An hour and a half after waking, early birds and night owls were equally alert and showed no difference in attention-related brain activity.

在醒后一个半小时，早鸟和夜猫子表现的同样机警，与注意力相关的大脑区域的活动也差不多。

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Dr Miller found that physical activity accounted for about half of the difference in immunity between depressed and normal women.

ECONOMIST: The power of negative thinking

"We understand the difference between investing in an asset that has value and adds value to economic activity as opposed to general spending, " said Rich Studley, president of the Michigan Chamber of Commerce.

NPR: In Michigan, GOP Governor Finds A Tax To Like

The difference here is that the social activity occurs within the boundaries of the enterprise process, in one process step, or in multiple as needed to carry the conversation forth across the process.

FORBES: Modeling Enterprise Social Business Processes