function key symbol造句

例句与造句

1. Office machines . symbols . function key symbols for typewriters
   办公机械.符号.打字机功能键符号
2. Office machines and data processing equipment - function key symbols on typewriters
   办公机器和数据处理设备打字机功能键符号
3. It's difficult to find function key symbol in a sentence. 用function key symbol造句挺难的