0 honest or lasting support, or loyalty, especially to a sexual partner -- (尤指对性伴侣的)忠诚,忠实,忠贞
1 the degree to which the detail and quality of an original, such as a picture, sound, or story, is copied exactly -- 准确度;精确性
The best ink-jet printers can reproduce photographs with amazing fidelity. 最好的喷墨打印机输出的照片效果会非常逼真。