For example, the double wavelength Nd-YAG laser is especially effective on freckles and tattoos, while the ruby laser eliminates deep pigmentation spots.
例如，可以射出雙波長的 (雅鉻雷射，用來去除雀斑、刺青，效果很好，紅寶石雷射則用來去除母斑、顴骨斑等深部的色素斑。