heartbeat
noun
ˈhɑːtbiːt
noun
1
the
action
or
sound
of
your
heart
as
it
pumps
blood
through
your
body
心跳，心搏
2
be a heartbeat away from sth
to
be
very
close
to
a
situation
or
position
〔状态或位置〕非常接近某事物
3
in a heartbeat
very
quickly,
without
delay
一下子
AmE
Things
can
change
in
a
heartbeat.
情况会瞬间发生变化。
4
the heartbeat of sth
the
main
origin
of
activity
or
excitement
in
a
place
or
organization
[美] 〔活动、机构等的〕中心，核心
AmE