1. 埃長(zhǎng)度單位，等于一厘米的百萬分之一（10－8），用來記錄輻射波長(zhǎng)
   A unit of length equal to one hundred-millionth(10-8) of a centimeter, used especially to specify radiation wavelengths.
2. 波段，波帶電磁輻射的波長(zhǎng)和頻率的特定范圍
   A specific range of wavelengths or frequencies of electromagnetic radiation.
3. 非單一波長(zhǎng)或頻率的由多種不同波長(zhǎng)或頻率組成的
   Consisting of different wavelengths or frequencies.
4. 發(fā)光效率一定波長(zhǎng)的光量對(duì)同樣波長(zhǎng)的輻射光量的比例
   The ratio of luminous flux at a specific wavelength to the radiant flux at the same wavelength.

波的英語翻譯：

長(zhǎng)的英語翻譯：