求翻译：了解无线电发送和接收设备的组成和基本工作原理；重点掌握构成发送和接收设备的各单元电路工作原理，典型电路，性能特点，工程分析方法以及高频电路的测试方法等。是什么意思？

Understanding of the radio transmitting and receiving equipment, composition and the basic working principle; focus grasp to constitute the sending and receiving equipment of each unit circuit works, a typical circuit, performance characteristics, methods of engineering analysis and high-frequency c

Learn about radio send and receive the composition and basic equipment operation; in sending and receiving devices pose of the unit circuit theory, a typical circuit, performance characteristics, as well as engineering analysis methods of high-frequency circuits, such as test methods.

Understands the radio transmission and the receiving apparatus composition and the basic principle of work; Key grasping constitution transmission and receiving apparatus various units electric circuit principle of work, typical circuit, performance characteristic, project analysis method as well as

Understand radio composition and basic principles of the sending and receiving devices; focus on mastering composition unit of the sending and receiving device circuit works, a typical circuit, performance characteristics, such as engineering and the testing method of high frequency circuit analysis

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