◆to keep your finger on the pulse (of sth) or to have your finger on the pulse (of sth)(对…)保持消息灵通；掌握(…的)最新情况
It's important to keep your finger on the pulse by reading all the right magazines.通过阅读合适的杂志来保持消息的灵通很重要。
He claims to have his finger on the pulse of the industry.他声称对这个行业的发展了如指掌。