flaw echo造句

例句与造句

1. A method based on wavelet transform according to the characteristics of ultrasonic flaw echoes was put forward for signal denoising in ultrasonic testing
   摘要根据超声检测缺陷回波的特点，提出了基于小波变换的超声缺陷回波的去噪方法。
2. It's difficult to find flaw echo in a sentence. 用flaw echo造句挺难的