LOL at a lolcat and your LOL gets logged for all time on your indelible activity record.

你在一张搞怪猫的图片下面哈哈了一下，你的这个哈哈就会被一直记录在你的活动记录里了，删不掉了。

youdao

Special machines were used to follow and record brain wave activity.

特殊机器被用于跟踪和记录脑电波活动。

youdao

The study was done using equipment to track and record brain wave activity.

这项研究使用设备来跟踪和记录脑电波活动。

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If you put the electrodes in the right position and you measure in the right way you can detect the electrical activity of the heart and record it on a strip recorder like this one shown here, or display it on a computer.

如果将电极放置正确,并采用正确的方式检测,就能检测到心脏的电活动,并将它记录在像这样的长图记录仪上,或者显示在电脑上

耶鲁公开课 - 生物医学工程探索课程节选

The Geonaute 360 with three outward facing lenses is designed to sit atop a helmet and record activity in every direction.

BBC: How tiny cameras have become big business

Boyden and Forest, working with Forest's graduate student Suhasa Kodandaramaiah, developed a robotic system to record activity of a single neuron in the living brain using a tiny glass tube.

CNN: Top brain scientist is 'philosopher at heart'

Use the credit card at least a couple of times a year and pay the bill online to show activity on your credit record.

WSJ: Getting Going: Managing Your Finances Abroad