Palpitation from frequent extrasystoles or other arrhythmia is common.来自频发的期前搏动或其他心律不齐的心悸亦属常见.This normal variation in rhythm is known as sinus arrhythmia.节律的这种正常变化称为窦性心律失常.The heart frequently exhibits ventricular arrhy...
I can't believe that those two murders are unconnected.我不相信那两桩谋杀案之间毫无关联。These latest murders have heightened fears of further attacks.最近发生的这些谋杀案让人们愈加担心会出现更多的袭击。He says he cannot yet draw any conclusions about the mu...