“忠诚的”用英语怎么说？

对于他们长期以来忠诚的效力我非常感谢。I thanked them for their long and loyal service.他成了费雯丽忠诚的朋友和给她安慰的人。He became Vivien Leigh's devoted friend and comforter.他是一位忠诚的朋友.He is a loyal friend....