?忠诚于

忠诚于(be faithful to), 此释义来源于网络辞典。

?忠实于

... He is highly honoured for his loyalty to his country.他因忠于祖国 be faithful to忠实于；信守 be true to忠实于；遵守 ...

?对…忠实

... be absorbed in 全神贯注于，专心致志于;出神;只顾; be faithful to 对…忠实; be absent from 缺席，不在; ...