Once he took the vow his loyalty never wavered.

一旦他发了誓，他的忠诚从不动摇。

《新英汉大辞典》

Even under such a test as this his loyalty to his friend stood firm.

即使在这样的考验下，他对朋友的忠诚仍然坚如磐石。

youdao

Though Qu Yuan died thousands of years ago, he is remembered every year for his loyalty to his country and his people.

虽然屈原在几千年前就去世了，但人们每年都纪念他，因为他忠于国家，忠于人民。

youdao

They did not question his loyalty to the United States.

VOA: special.2009.06.14

He bought the loyalty of his soldiers, when they were being taken out of his control.

他收买了士兵的忠心，当他们正要离开他的控制的时候。

耶鲁公开课 - 新约课程节选

But,there was a big problem, that for all of his failings,human failings, and there were indeed many, and his intellectual limitations which were daunting, he was a man of faith and loyalty to his principles, for better or for worse,in this context.

但是他的弱点,人性的弱点,是个大问题,而且他的弱点确实很多,还有他的智力界限也令人沮丧,他是个固执于自己原则的人,不管原则是好是坏

耶鲁公开课 - 1871年后的法国课程节选

It was his loyalty, not his independence, that qualified him for the top job.

ECONOMIST: Russia's political leaders

He always put his loyalty to Mr Kohl above almost everything, even his own ambitions.

ECONOMIST: Wolfgang Sch?uble, Germany��s Sisyphus

Giving a customer precisely what he wants is a sure way to strengthen his loyalty.

ECONOMIST: Car making