System presents the running log of the system activity.

系统显示系统活动的运行日志。

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probe point: Identifies a point during normal system activity capable of being probed.

探测点（probe point）：标识正常系统活动期间能够进行探测的一个点。

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Learn how administration API enables you to monitor system activity using SQL commands.

学习如何通过管理API使用SQL命令监视系统活动？

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Both drugs turn off a natural brake on immune system activity called CTLA4 (cytotoxic T-lymphocyte antigen 4).

FORBES: Magazine Article

What is needed, but is extremely difficult to develop, is a way to recognize the character of a virus and differentiate it from normal system activity.

CNN: Technology - Analysis: Understanding viruses

In keeping with previous work, they found that high- and low-rank individuals showed different levels of responsiveness to a class of hormones called glucocorticoids, which regulate immune-system activity and response to stress.

ECONOMIST: Social status and health