palpitation
n
1 [U] act of palpilating 心悸; 颤动.
2 palpitations [pl]
(periodof) rapid beating of the heart 心悸(期)
I get palpitationsif I run too fast. 我跑得太快时就心悸.
(fig 比喻) The thought of flying gives me palpitations, ie makes me very nervous. 一想到飞行我心情就紧张.