keep (your) finger on the pulse
have (your) finger on the pulse - to be familiar with the most recent developments.
As editor of a fashion magazine, she keeps her finger firmly on the pulse of the London scene.
英语词组固定搭配大全包含18674条英汉双解词组,基本涵盖了全部常用英文词组、短语的翻译及用法,是英语学习的有利工具。