multiple frequency VLF technique

例句：

1. 1. The multiplefrequency VLF technique is a powerful tool for analyzing complex systems.
   多重频率VLF技术是分析复杂系统的强大工具。
2. 2.In the field of radio engineering, the multiple frequency VLF technique has been widely used to improve signal quality.
   在无线电工程领域，多重频率VLF技术已被广泛使用来提高信号质量。
3. 3. The multiple frequency VLF technique has proven to be effective in reducing electromagnetic interference in electronic devices.
   多重频率VLF技术已被证明在减少电子设备中的电磁干扰方面是有效的。