英语翻译这是一种信仰,它不仅要求管理者必须具备,而且普通员工也必须具备（这种信仰）.

这句只能用定语从句或者是同位语从句来翻译:
This is a kind of belief,which not only must managers must have,and ordinary employees should also have .
This is a kind of belief,one that not only managers but also the ordinary staff are required to have.