long wavelength pass filter

例句：

1. 1. Thisfilter is designed to block out long wavelengths of light.
   这个滤波器设计用来阻挡长波长的光。
2. 2. The scientist used a long-wavelength pass filter to study the spectrum of the star.
   科学家使用了一个长波长通过滤波器来研究这颗恒星的光谱。
3. 3. The engineer needed a long-wavelength pass filter to filter out the noise from the radio transmission.
   工程师需要一个长波长通过滤波器来过滤掉无线电传输中的噪声。