责任/义务(responsibility/duty)↓
（obligation、be obliged to do、imperative）
①Employers have an obligation to treat all employees equally.
雇主有义务平等对待所有员工。obligation:法律义务或道德义务
②Companies are legally obliged to pay the minimum wage.
公司有支付最低工资的法律义务。
【oblige是obligation的动词形式】
③Respecting the elderly is one of the most important moral imperatives in the Chinese society.
尊敬老人是中国社会中最重要道德义务之一。
【imperative作名词，表示必要的事，常与moral搭配】
