1. As compared to common compensators, this compensator is convenient to operate, and has a high degree of accuracy and a good nature of achromatism. 给出一种新的三元复合式消色差补偿器，该补偿器具有调节方便、精度高、在一定波长范围内消色差性能良好等优点。
2. From the characteristic of harmonic relief patterns, the a thermalization and achromatism of harmonic diffractive element have been studied in the paper. 从谐衍射元件的理论出发，讨论了谐衍射透镜在消色差和消热差时的特性。
3. The method for determine sewage's chroma is method of dilution multiple. It's easy to bring in error when using eyes to determine the diluted sample is whether achromatism or not. 污水色度的测定一般采用稀释倍数法，该方法在用人眼判定稀释后的水样是否接近无色时容易引起误差。
英英解释
n.
1. the visual property of being without chromatic color
