Systolic murmur along the left sternal border accompanied with wide pulse pressure and peripheral vessel signs;
③胸骨左缘收缩期杂音伴脉压大及周围血管征；
Elderly people cannot because they have stiff aortas and consequently they are going to get a wide pulse pressure.
老年人不能，因为他们有动脉硬化，所以他们的脉压差大。
MSEM system, which boasts apparent advantages over both constant-pressure and pulse-pressure charging systems, has found wide deployment presently.
兼有变压系统和定压系统优点的MSEM系统目前已得到广泛应用。
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