That is done using ultrasound, which is generated by a box called a pulse-generator that is similar in size to a pacemaker box, but is inserted lower down in the chest (see illustration).
这个问题可以通过使用超声波来解决，也就是利用一个大小和心脏起搏器差不多，名为“脉冲发生器”的盒子来完成，但是它需要被放在胸腔下部(如上图所示)。
Corduroy blinked.There was a chair and a chest of drawers, and alongside a girl-size bed stood a little bed just the right size for him.
小熊眨着眼睛，房间里有一把椅子和一个有抽屉的柜子，和女孩床并列的还有一张刚好容得下他的小床。
Corduroy blinked. There was a chair and a chest of drawers, and alongside a girl-size bed stood a little bed just the right size for him.
小熊眨着眼睛，房间里有一把椅子和一个有抽屉的柜子，和女孩床并列的还有一张刚好容得下他的小床。
The intensity of the murmur reflects the size of the valvular leak, the acoustic properties of the chest, and the pressure difference across the valve.
其强度提示瓣膜泄漏面积、胸腔声学特征、及穿过瓣膜的压力差异。
And that treasure chest, with footprints of your size leading up to it, your lockpick still in the lock, and a strand of long red hair snagged on the latch?
那么那个宝箱又是怎么回事？有你那个尺寸的脚印通到那里，你的开锁工具还留在锁上，而且锁销上还卡着一根红色的长发。
The mass should be evaluated for size, shape, texture, tenderness, fixation to skin or chest wall.
应评估肿块的大小，形状，质地，压痛，于皮肤或胸壁的固定度。
Results:Myocardial infarct size of chest pain stimulation group reduced significantly compared with AMI control group.
结果：心前区疼痛刺激组较急性心梗对照组心梗面积显著减小。
Staging is often done by radiographic means, with CT scans used to determine where lymphadenopathy is located, ultrasonography to determine size and lesions of liver and spleen, and chest radiograph.
分期常常是通过放射手段完成的，CT扫描用来定位病变淋巴结，超声和胸片用来判断淋巴结的大小和肝、脾病变。
For now, rejected by her mother, the palm-size primate is making do with a warm quilt instead of her mum's belly and chest.
眼下，这只被妈妈抛弃的手掌大小的灵长目动物正将就着在一个温暖的被窝里而不是在她妈妈的胸怀里。
For now, rejected by her mother, the palm-size primate is making do with a warm quilt instead of her mum's belly and chest.
眼下，这只被妈妈抛弃的手掌大小的灵长目动物正将就着在一个温暖的被窝里而不是在她妈妈的胸怀里。
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