They attended faithfully to their duties.是什么意思？

They attended faithfully to their duties.

他们忠于职守。

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

attended

v. 参加( attend的过去式和过去分词 )，注意，听，照顾，[常用被动语态]（作为结果、情况）伴随；

例句
As part of the treatment, he attended 15 weeks of aftercare...
作为治疗的一部分，他接受了15个星期的病后护理。

faithfully

adv. 忠实地，诚心诚意地，如实地；

例句
He was little more than a cipher who faithfully carried out the Fuehrer's commands.
他只不过是个走狗，忠实执行元首的命令。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

their

pron. 他（她，它）们的，在提及性别不详的人时，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

duties

n. 关税，责任，上班，职责，职责（ duty的名词复数 ）；

例句
I carried out my duties conscientiously...
我一丝不苟地履行我的职责。