n.心跳；中心；重要特征
I can feel my heartbeat flunking out. 我可以感覺出自己的心跳得厲害.
She felt her heartbeat quicken as he approached. 隨著他的走近，她覺得自己的心跳加速了。
The candidate said that he understood that heartbeat of the Hispanic community in California. 這位候選人說他了解加利福尼亞州的西班牙語裔美國人社區(qū)的特點(diǎn)。
