The GE process for making a transducer begins by spreading onto the print table a thin layer of ceramic slurry containing a light-sensitive polymer.

GE对加工换能器的方法是首先在印刷台上撒上薄薄的一层陶瓷粘土，其中混入一种光敏聚合体。

She doesn't care about piezoelectric micromachined ultrasonic transducers.

她并不关心压电微加工超声换能器。

So for example, we can make them all come together to a point, and they can we can make transducers from the bottom and from the top come to two different points that are half a wavelength apart.

举例子，以将它汇聚到一点上，以让换能器分别从底和顶到达两相距长的点。

To do all this, though, you need a device called a transducer.

但完成该过程，你不能缺少一台叫做‘压电式换能器'的设备。

However GE, a large American conglomerate, is now proposing to make ultrasound transducers by " additive" manufacturing—or three-dimensional printing, as it is also known.

而GE作为美国的一庞大的企业集团正考虑采用‘对比添加式'的加工流程（或者又称大家所熟悉的‘3D印刷'）来加工超声压电式换能器。

Transducers are made from arrays of tiny piezoelectric structures that convert electrical signals into ultrasound waves by vibrating at an appropriate frequency.

压电式换能器是由具有‘压电'效应的一系列敏感元件机构组成。敏感元件机构通过‘定频'震荡将电信号转换成超声。

To make a transducer by painstakingly micro-machining a brittle block of ceramic material can take many hours of work, though.

压电式换能器需要用到陶瓷材料，而精密地加工一块精细的陶瓷材料就要耗费几小时的工作时间。

The waves are then reflected back from areas where there is a change in density and on their return the transducer works in reverse, producing a signal which the scanner can process into a digital image.

超声会从密度发生变化的介质反射回来，这时压电式换能器会反向操作产生信号，再经过扫描器的处理，最后进行数字成像。

Doctors can use an ultrasound transducer to make ultrasound waves that travel through your body, and reflect off different squishy bits, like organs, or a fetus.

医生以使用超声换能器产生穿过您身体的超声，并反射不同的软质分， 如器官或胎儿。

Then, the transducer uses the reflected waves to create an image.

然后， 换能器使用反射创建图像。