他对妻子的忠诚从未动摇过。

His ___fidelity to his wife never wavered.

这款相机能够以极高的保真度还原色彩。

This camera reproduces colors with remarkable ___fidelity.

婚姻中的忠诚是维系关系的重要基石。

___Fidelity in marriage is a crucial foundation for maintaining a relationship.