全球定位系统，几个电力转换器和一系列对大量设备发布指令的装置都被关闭了。
The Global Positioning System circuit, several power converters and a set of devices that route commands to various pieces of equipment were switched off.
针对usb GPRS调制解调器而言，USB - to - serial转换器一般us b端口转换为虚拟串行端口，因此系统其他部分就会将它看作串行设备。
For USB GPRS modems, a USB-to-serial converter typically converts the USB port into a virtual serial port so the rest of the system sees it as a serial device.
通常情况是创建一个针对对象的转换器，这些对象是你已经在系统代码中使用到的，并且你只是想将它们marshall或者unmarshall成为JMS（译者注：marshall/unmarshall，指将对象序列化为消息对象以及逆向过程。）
The general approach is to create a converter for objects that you are already using in your application code and simply want to marhsall/unmarshall them onto JMS.
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