finger是手指，pulse是脉搏，have one's finger on the pulse的意思是“熟悉、了解最新的变化或动态；紧跟最新动态”。

【例句】
The industry is changing every day. If you want to make progress, you have to keep your finger on the pulse.
这个行业每天都在变化，如果你想有所进步，就得保持跟进最新状态。

You should do your best to have your finger on the pulse of your team's activities.
你应该尽自己所能去掌握你团队的活动情况。