后胸辅搏动器很小，与背血管无直接通道，具有一个没有肌肉的搏动膜。
The metathoracic accessory pulsatory organ is very small and has no direct channels connecting the dorsal vessel, but there is a pulsating membrane without muscle.
医学超声多普勒系统的高通滤波器在消除血管壁搏动带来的回波干扰时，也滤除了低速血流信息。
In medical Doppler ultrasound systems, a high-pass filter is usually employed to remove wall clutter components which may also remove the information of the low velocity blood flow.
通过计数器计数给药前后心肌细胞搏动频率的变化。
The changes of the myocardial beat frequency before and after administration were counted.
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